|Thatchet 17 minutes ago||Reply to Cenozoic Dinosaurs and Pterosaurs in Alternative Evolution:
Oh ok I was just making a point about Neorinthes having more species than the other orders, your point still stands though.
Do you think it's possible to have Rodents and Lagomorphs in the project?
|lamna Today, 3:47 AM||Reply to So what happened to you today? in General Discussion:
I quite like how it makes the STO Romulans more desperate.
I was just thinking the other day how I missed firing off broadsides.
I've probably forgotten my password though.
|DK1000 Today, 1:54 AM||Reply to Dinosauroids in Alternate Universes:
Oh there's definitely intelligent life other than humans on Earth, and that includes a species of dinosaur. Just look at a eurasian magpie, they use tools, they have complex social rituals (possibly including funerals?) and have passed the mirror test (the only non-mammal to do so). And it's not just magpies, other corvids display high levels of intelligence (such as this sledding crow in Russia), and parrots also display high intelligence, just look at keas (which has already inspired a speculative sapient species).
|Nanotyranus Today, 1:53 AM||Reply to Dinosauroids in Alternate Universes:
There's four types of animal that are near-sapient right now: Primates (in the form of humans, chimps and capuchins), cetaceans (dolphins), corvids (crows) and.... parrots (keas). Half of them are effectively descended from raptors.
|AlienSyfy Today, 1:40 AM||New Topic in Alternative Evolution:
The mighty Silurian Species
|AlienSyfy Today, 1:35 AM||Reply to Dinosauroids in Alternate Universes:
I want to make it clear that intelligent life other than humans can evolve on Earth and not just on other planets? The question is: Is there intelligent life on Earth other than Humans?
|the dark phoenix Today, 12:33 AM||Reply to Dinosaurian spec in Alternative Evolution:
three new bats are up
I decided eating fruit and insects are not the only niches bats can keep and I found a way how they can live on the mainland along side pterosaurs.
their are no vampire birds or pterosaurs so the only type of bat that is seen on continents are vampire bats
|Dragonfly Today, 12:07 AM||Reply to The Planet Hera II and its lifeforms in The Habitable Zone:
Oh, yes, youre right.
Over millions of years the hydrogen level would rise. How about that: just plants generating hydrogen and the animals just using it. I thought about desert plants as stabilisators, which generate their water from H and O. Atmospherial algae (air plancton) could do that too.
|Even Yesterday, 11:43 PM||Reply to Viam Alternatus in Alternative Evolution:
|RavingShark Yesterday, 11:34 PM||Reply to Dinosauroids in Alternate Universes:
are we talking only dinosaurs, or some other animals from other ages? I believe that troodons, given enough time and a relatively stable environment, could've become sapient.
|RavingShark Yesterday, 11:31 PM||New Topic in Evolutionary Continuum:
world of gladiators
|AlienSyfy Yesterday, 10:27 PM||New Topic in Alternate Universes:
|The Xenologist Yesterday, 10:25 PM||Reply to The Xenologist's Hollow Earth in Alternative Evolution:
Uh, yeah...if I ever end up doing this again, now that I have a more complete set of profiles, I'll probably rearrange them so that it's easier to find specific creatures. When I go back looking for something I need to reference, I'm having that same problem, that the creatures are sort of randomly scattered in no particular order. You know what, when I've finished this I'm going to stick them all together the way they need to go at the end.
Also, I'm going to be at a college orientation for the next five days--I'm having a busy summer! So unfortunately, I won't be able to post during that time. It's too late at night for me to give a big gigantic update, so here's another of those weird terrestrial tunicates I was talking about earlier:
Understory Squirt (Lignovas columpascens)
Size: 2 feet tall
Coloration: brown, to match tree bark
Diet: airborne organic matter
First Arrived: 385 mya
Habitat: understory of Etyeyen-hout
Appearance: Small-mouthed, thin, tall tunicate
Biology: This comparatively tall tunicate has adapted to yet another new environment--the branches of trees. Its ancestors were likely alpine tunicates, the likes of which can still be found in the mountains. They probably migrated to tree branches when they were carried there by animals; tadpoles that accidentally flipped onto a flying creature would have fallen into the jungle and likely became entrapped among the branches. Hardier ones that managed to root down on branches slowly evolved into the way they exist today. Feeding is no problem when the air here is so thick with spores, pollen, microorganisms, and other small organic particles, so this particular species has reverted to a filter-feeding lifestyle. That is why its body cavity and mouth are so much narrower than other tunicates, as this is an adaptation to deal with lesser supplies of food. Their tadpoles, on the other hand, are faced with challenges involving living among trees. They have evolved a small set of ten pseudopodia that act as feet, allowing it to "walk" along the branch after being birthed from its parent. Eyes help it see where it is going, and its tail helps it balance on thinner branches. It is still only haploid, however, and must be fertilized by another adult tunicate to become diploid. It then wanders off, reproduces asexually, develops a mouth, eats its asexual offspring, and grows into an adult right then and there. Its coloration helps it blend in with the trees it lives among. Tadpoles that lose their grip and fall to the forest floor will attempt to find debris to crawl along as if it were a branch, but the lack of adults to be fertilized by makes them unable to grow and they run frantically around, getting faster and faster until they finally drop dead without warning.
|AlienSyfy Yesterday, 10:25 PM||New Topic in Evolutionary Continuum:
Alien Encounters or Visits from Time Travellers
|AlienSyfy Yesterday, 10:21 PM||New Topic in The Habitable Zone:
Reported Sapient Beings
|Parasky Yesterday, 10:20 PM||Reply to So what happened to you today? in General Discussion:
Today I played Star Trek Online because I realized the Legacy of Romulus expansion had came out quite some time ago and I didn't notice. They've improved the game yet again, as they did when it went free to play, and I'm getting enjoyment out of the new playable Romulan Republic faction and its storyline. I don't like how I had to ally with either the Federation of the Klingon Empire (I chose Federation, because I never play my Fed character), but at least I'm just allied with them and only have access to their stuff, rather than actually being a member of Starfleet/KDF. I didn't like how JJ Abrams destroyed Romulus for his movie, but I think the writers did an outstanding job working with it for this game. They've given the Romulans so much depth, and for the first time you really get to see them as regular people that are fed up with being oppressed by their own government and reviled by all others. They've really broken out of the stereotypes the show gave to the alien races, and the Romulans are the best they've done yet.
Even if you don't like Star Trek, you should take a look at this game. It's a great sci-fi game and one of the best shooter-based MMO games I've ever played. It's in the spirit of Star Trek, and with all the lore references being a Trekkie really does add to the experience, but it's a well made game in its own right as well.
|Parasky Yesterday, 10:11 PM||Reply to Plausible interstellar travelling in Tech Discussion:
I'm no superluminal propulsion engineer, amateur or otherwise, but one problem often overlooked with interstellar travel is communication. Unless you intend to build a large ship that is totally self-sufficient, chances are at some point you're going to have a problem that only somebody back home can fix. This can be problematic if the trouble is urgent and your message won't even arrive back at HQ for a few months/years, let alone Control's response. I think I have a rather reasonable idea for a solution though: wormholes.
To be more specific, I'm talking about a microscopic Einstein-Rosen bridge with one point on the craft in question and one back at HQ. I don't know how you would make one or keep it stable, but from what I've read it wouldn't require much energy at all to do either. On a larger scale it would be implausible, as the bridge would collapse before anything sent through it had time to reach the other side and any materials or people that were inside would be crushed by the resulting brief singularity. On a microscopic scale, however, it might be possible to send radio signals or laser beams through it and have them safely pass to the other side, delivering a message more or less instantaneously. Like I said, it's just an idea. Somebody better than I would have to figure out the specifics, as I am not good with math and that greatly limits my understanding of the final details of physics.
|AlienSyfy Yesterday, 10:10 PM||Reply to World Building Resources in The Habitable Zone:
What do I do if I want to make Earth-like planets believable? What would I have to assume about how common they are?
|whachamacallit2 Yesterday, 10:08 PM||Reply to Plausible interstellar travelling in Tech Discussion:
Aww, I presume your talking about its acceleration of 1.5 gs? I sort of thought that that part was sort of unbelievable.
I wonder though, could a bussard scramjet work as an interstellar craft?
|Archipithecus Yesterday, 10:07 PM||Reply to The Apotheosis Game in General Discussion:
That's ok dial. I am planning to join, I just need a good idea. I'm thinking about a god of travels and luck
|Hybrid Yesterday, 9:46 PM||Reply to So what happened to you today? in General Discussion:
|trex841 Yesterday, 9:17 PM||Reply to So what happened to you today? in General Discussion:
"Self cooking squid, I'll save a fortune!"
|Hybrid Yesterday, 9:14 PM||Reply to So what happened to you today? in General Discussion:
Meanwhile in Japan...
|Parasky Yesterday, 9:13 PM||Reply to Pokemon Topic Number 2! in General Discussion:
Clefairy isn't a fairy though. It's an alien. The fact that there is an entire page of bulbapedia dedicated to extraterrestrial pokemon pleases me greatly.
|trex841 Yesterday, 8:50 PM||Reply to So what happened to you today? in General Discussion:
You know, The old outer god Mentioned something about that comment.
|Russwallac Yesterday, 8:41 PM||Reply to So what happened to you today? in General Discussion:
Ph'nglui mglw'nafh Cthulhu fy'rwirks wgah'nagl fhtagn.
|T.Neo Yesterday, 8:41 PM||Reply to Plausible interstellar travelling in Tech Discussion:
The ISV Venture Star was absolutely awesome, and probably the best spacecraft design in a major motion picture in recent history.
However, it suffers from the same problem as my designs (albeit on a far larger scale), it's just way too powerful for its size.
That's called staging and it's an incredibly common technique used in rocketry, every single launch vehicle to date has used it in some form and it's been used by pretty much every space mission in one way or another. It could potentially be applied here, and with considerable benefit.
The only issue is that rocket bits flying around at considerable fractions of the speed of light might be bad manners.
|Zorcuspine Yesterday, 8:08 PM||Reply to So what happened to you today? in General Discussion:
Wait where did you here this? I'd love to here the source, as If that's true it's good news
Edit: Nevermind found it
|colddigger Yesterday, 6:35 PM||Reply to So what happened to you today? in General Discussion:
Hellz yea the first zoo tycoon. I got that special ibex disc or whatever.
Apparently the Xbox One is switching to standard console shit? No internet connection required, and regular game disc sharing and all that? I dunno.
|whachamacallit2 Yesterday, 6:35 PM||Reply to So what happened to you today? in General Discussion:
I only had ZT2, but I used to make adventure videos with them. Deleted all the videos now, but they got their fair share of views.
|citrakayah Yesterday, 6:30 PM||Reply to Plausible interstellar travelling in Tech Discussion:
If this is a one-way trip, why stop the whole ship? Why not simply have your cargo (including any passengers) ejected? I know conservation of motion and all, but you'd need less fuel to stop a ship the fraction of the size of the earlier ship. At the very least you wouldn't need an equivalent amount of fuel if you ditched the empty canisters.
|urufumarukai Yesterday, 6:23 PM||Reply to Apotheosis: Aedificatoris in absentia in Cafe Cosmique:
The black horse follows the marching spartan army, just outside their ranks. In the night the horse vanishes and the Spartans receive visions of their capitol burning to the ground, the name Kai can be heard in the screams of the women and children trapped in the burning buildings. The black horse wakes the general for his nightmare and announces that it is an avatar of the Mighty Kai , It goes on to say that should the Spartans continue their march they will only face death. the only way they will me able to save their way life is to join the citizen of Pylos and embrace Kai. The horse seems to glow faintly before dissipating into the shadows again.
The Oracle of Kai (the princess) after receiving visions of the amassing spartan force send the new army of Plyos to build fortifications for the city, they are ordered to mobilize after the completion of the fortification and strictly not to harm anyone willing to accept the way of Kai.
|trex841 Yesterday, 6:08 PM||Reply to So what happened to you today? in General Discussion:
I had zoo tycoon back when it looked like this.
...I though that picture would be bigger...
|malicious-monkey Yesterday, 6:05 PM||Reply to So what happened to you today? in General Discussion:
RCT was the shit. I still play it every now and then.
|trex841 Yesterday, 6:03 PM||Reply to So what happened to you today? in General Discussion:
Why am I hearing the elephant as colonel hathi and the lemur as king Julian?
|Fakey Yesterday, 5:59 PM||Reply to So what happened to you today? in General Discussion:
And here I am not giving a shit about Zoo Tycoon.
Rollercoaster Tycoon is where it was at.
|trex841 Yesterday, 5:58 PM||Reply to Garry's Mod Paleoarrt in Cafe Cosmique:
This is good stuff.
|whachamacallit2 Yesterday, 5:49 PM||Reply to Plausible interstellar travelling in Tech Discussion:
I recall that Atomic Rockets once mentioned that the movie Avatar actually had a very well designed interstellar spacecraft, unfortunately, I don't remember any of it.
|T.Neo Yesterday, 5:38 PM||Reply to Top 10 Possible Next Steps in Human Evolution in Evolutionary Continuum:
And the problem is that it isn't the same opinion. It isn't even the same type of opinion, so to speak. It's a subject of a different nature with different views on it and different ramifications of those views.
Like many ideas in human history, it really is a great idea- unless you are the one on the receiving end, rather than the one benefitted by it.
That said I personally support the elimination of diseases caused by genetics (not "brown eyes" or "a bit lanky" or "some autistic traits", but genuine disease).
|Russwallac Yesterday, 5:36 PM||New Topic in Cafe Cosmique:
Garry's Mod Paleoarrt
|T.Neo Yesterday, 5:35 PM||Reply to Plausible interstellar travelling in Tech Discussion:
Indeed I do, and I'm a bit notorious here and elsewhere for creating fictional spaceships that explode, so I should be able to help.
Firstly, everything below fission propulsion can be discarded as a serious means for interstellar travel, unless you want your travel time to be geologically slow. Fusion is better than fission because the fuel has a higher energy density, and gives a higher specific impulse. Antimatter is best in terms of energy density and specific impulse (if using a beam core, or better), but suffers from the following problems;
Spoiler: click to toggle
As for solar sails, might be viable inside a solar system, but pointless in interstellar space where the impulse provided by starlight is minimal. You need to evolve the idea to beamed power- where you use a sail pushed by a laser, maser, or even a plasma beam (this would be a magnetic sail, not a physical one- a similar concept has been proposed to utilise the solar wind for propulsion). It's a nice idea, because you don't need to carry propellant or engines onboard. The problem, however, is that the laser back home needs to be fairly large- perhaps, hundreds or thousands of terawatts in output. Again, not a trivial undertaking, and also one with other ramifications (it smells of 'Death Star for beginners'). And of course, unless you want to build a gigantic laser array at another star system, you can't use it for a return trip.
The thermal issue is the main problem though (aside from technical details like actually being able to build a fusion rocket). This has been the bane of my speculations and I see that you've touched on it quite a bit, but I'd like to share what I've discovered through my experiences (which may or may not be helpful);
- I've limited calculations based on temperature to the engine bell itself, which in most cases I have assumed to be a hemisphere composing a magnetic nozzle; the exhaust is deflected by a set of magnets and does not come into physical contact with the vehicle, and a reflective facing material reflects waste heat from the spacecraft. Larger engine bells are better from a thermal standpoint, due to waste heat being distributed over a wider area. I've also assumed radiators that remove heat from the engine bell, rather than an engine bell that is entirely passively radiatively cooled.
Spoiler: click to toggle
- People talk about high acceleration spacecraft often, and it is what they get the most wrong. A fusion spacecraft that accelerates at 10G is the spaceflight version of the Insanity Wolf meme. A spacecraft that accelerates at 1G is pretty cool, but still incredibly overkill for most purposes.
Spoiler: click to toggle
- The relationship between specific impulse and thrust power is pretty important to understand.
Spoiler: click to toggle
- The waste heat is going to be mostly in the form of X-rays, not nonionizing radiation.
Spoiler: click to toggle
- The limiting factor in acceleration is the TW ratio. Sure, there's nothing preventing the creation of an engine that puts out petawatts of power- but it'll be absolutely gigantic, and heavy. It'll have a large amount of thrust, but it won't be able to accelerate very fast due to its large mass. So acceleration will be limited by the maximum specific power that a drive can have, which will in turn determine the TW.
That said, I think interstellar flight should be quite possible- it might be that it is wildly impractical, but not impossible. I think Holben is being overly skeptical and that his spacecraft from LEAP is pretty conservative, compared to various studies that have been performed such as Daedalus and Longshot, which, while not at all without their problems, are not treated with the degree of incredulity that they would be if they were truly that far off the mark (though I might just be deceived by the scale of his payload and my ability to mix up orders of magnitude). I realise that the long travel time is partially because his target star is over 1000 ly away, rather than the few light years or tens of light years that are usually discussed for interstellar missions, but tens of thousands of years is a long time, and having such a long travel time is problematic in itself, potentially as much of a showstopper as propulsion problems are.
My suggestion would be to research existing discussions and studies on the subject. Project Daedalus is probably the classic, quintessential one. Project Longshot is probably worth reading through too, as is the Valkyrie spacecraft concept if one wants to have a look at something a bit closer to Star Trek. There are ongoing blogs and sites related to the discussion as well, Project Icarus looks pretty interesting but I haven't read through it in ages so I'm not sure what they're up to these days.
Apologies for yet another gigantic post, everyone.
|whachamacallit2 Yesterday, 5:33 PM||Reply to So what happened to you today? in General Discussion:
As a response to this news:
|Zorcuspine Yesterday, 5:32 PM||Reply to So what happened to you today? in General Discussion:
Ah come on really?! The games that defined my childhood finally get a sequal and its for the Xbox one... What a shame
P.S: Sorry about the siggy. Thanks Parasky
|Arachnus Yesterday, 5:25 PM||Reply to Top 10 Possible Next Steps in Human Evolution in Evolutionary Continuum:
I don't see anything wrong with 'weeding out' any potentially detrimental birth defects, but anything more seems unethical.
|lamna Yesterday, 5:02 PM||Reply to So what happened to you today? in General Discussion:
I found out they are making a new Zoo Tycoon.
Then I found out it's only for the Xbone.
And it is just called Zoo Tycoon, because Apple.
|Watcher In The Puddle Yesterday, 4:54 PM||Reply to So what happened to you today? in General Discussion:
A simple flash game, but it really connects you with the people down there. I just lost my character and my city and everything is now dust.
|whachamacallit2 Yesterday, 4:38 PM||Reply to So what happened to you today? in General Discussion:
|Watcher In The Puddle Yesterday, 4:23 PM||Reply to So what happened to you today? in General Discussion:
I got attached to a game character for the first time and she died.... :c
|Electreel Yesterday, 4:23 PM||Reply to Naming your Creatures in General Spec:
I added more terms and I arranged it in alphabetical order:
|trex841 Yesterday, 4:16 PM||Reply to So what happened to you today? in General Discussion:
Says that it won't let me post to avoid abuse, Double posts anyway. Uhg.