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Great Pyramid Mystery Solved?
Posted by: NationalGeographic
Video duration: 291 seconds
How were the blocks raised to the top of the 489ft Great Pyramid? An architect develops a theory about a snaking internal ramp that's been hidden inside the pyramid for 4500 years.
Unlocking the Great Pyramid :
SUN NOVEMBER 16 9P et/pt
Related: adventure, ancient, anthropology, archaeology, burial, egypt, egyptoloy, events, exploration, forensics, great, history, investigat, kings, lost, of, pharaoh, pyramid, the, unwrapped, valley, world, worlds
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Anaconda vs. Mammal
Posted by: NationalGeographic
Video duration: 167 seconds
When you're an anaconda you don't need venom to take down your prey, even if its the world's largest rodent, a capybara, weighing somewhere in the neighboorhood of one hundred pounds!
See all National Geographic videos: http://video.nationa lgeographic.com/vide o/?source=4001
Related: ammal, anaconda, capybara, choke, geografic, geographic, national, predator, prey, squeeze, venom
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Latest comments made on this video:
By: btsvEintracht. on 21 Nov 08, 18:13:10
ya ya australia the best to germany im netz da wohne ich und hier gibts auch viele dinosaurier.
By: nicholasrmadman. on 19 Sep 08, 16:31:57
ya its calld D.N.A
By: roundfrenchcheese. on 03 Aug 08, 09:43:33
Strange OLD animals, australia's wildlife is older than the rest of the worlds
By: lonix23. on 24 Jun 08, 02:40:32
maybe your penis only dont become large.. lol!!!
By: DavidArchuletah. on 17 Jun 08, 11:20:57
why penis didn't become larger
By: 000266617. on 23 Apr 08, 14:12:17
I agree. And I am glad you are wise enough Choken1, to realize this. My responses would be an entire book, really an entire book. And likewise, your comments would be lengthy. Besides, this is supposed to be a dinosaurs here, and it wouldn't be fair.
By: Choken1. on 23 Apr 08, 11:00:00
Look. Carrying on a conversation on this scale is too hard here with the limited space we get and we'll just end up flooding the comments with our posts. I think we'll just have to agree on disagreeing.
By: Choken1. on 23 Apr 08, 10:56:56
I didn't mean that chameleon got his ability instantly. I meant that you can't compare his ability to change his color to the example that I mentioned. If you look at different regions of the planet; Arctic, Tundra, temperate, Tropical or Deserts you should see that the animals living in those areas are specially fit to live there and wouldn't thrive that well in most other biomes. Earth is always changing. The animals change with it. I don't see why it's so hard to believe that.
By: 000266617. on 23 Apr 08, 02:34:52
I thought the chameleon would develop this ability after millions of years of evolution, and not instantly? You give facts about creatures, but nothing proves that something evolves or has evolved.
By: Choken1. on 22 Apr 08, 18:36:54
Camouflage is actually a strong point when it comes to supporting evolution. It's not like this happens "just because". It's survival of the fittest. Whenever a mutation occurs, and it happens all the time, the resulting offspring would either have characteristics that are better or poorer then the parent. This could be different colored fur, differently shaped scales, stronger hind legs, poorer vision and so on. If these changes help the creature to survive it will live to make offspring.
By: Choken1. on 22 Apr 08, 18:29:16
This progress is completely different from chameleon's ability. Chameleon has the ability to instantly contract/expand it's color pigments and thus change color. The example with the butterfly is explained in a previous posts but it took generations. A different example would be if an animal would migrate to a colder. Over time, it's descendants (children's children) would develop thicker fur to resist the cold better, whiter coat to hide better in snow and other similar things.
By: 000266617. on 22 Apr 08, 14:21:20
Choken described a good example of camofloge. The cameleon does this also and other species. Being able to blend in and change color has nothing to do with evolution, though. (please excuse my spelling)
By: Choken1. on 22 Apr 08, 10:52:02
There are thousands of different breeds of butterflies that are vastly different. There's also a huge difference between black bears and polar bears. Neither one could live each others territory. It's just like tigers and lions. They started out the same once but different environment changed them. Evolution is a long term effect of natural selection. Undesirable traits disappear while the desirable ones are enhanced, changing the animal. It takes generation for noticeable changes to occur.
By: 000266617. on 16 Apr 08, 19:44:41
"the butterfly had evolved into a black butterfly" If its still a butterfly (but black) how can it be said to evolve? We have black bears and polar bears. Different bears. No evolution. The polar bears color changes when it's in warmer weather, but its not evolution.
By: poopeman. on 09 Feb 08, 17:28:47
he just beamed a peice of meat in the crocodiles mouth LOL
By: zoekozoeko. on 02 Feb 08, 13:19:12
That's only an example of natural (or unnatural in this case) selection. The white moths still existed.
By: ZapherJin. on 21 Dec 07, 06:12:38
i guess that makes sense, i was wondering that same thing actually, thanx
By: 5emster5. on 20 Dec 07, 06:26:31
tl:dr But i think you are saying what i'm thinking so thumbs up.
By: Choken1. on 14 Dec 07, 22:04:39
Few decades later the butterfly had evolved into a black butterfly (this process is much faster with insects since a generation for them are few months or even weeks). Later, when coal plants quit being the main source of power and pollution in the area dropped, the trees started to lighten up and the butterflies as well, since the darkest ones where being eaten again.
By: Choken1. on 14 Dec 07, 22:03:17
Here's a good example. There's a type of butterfly in Britain that is normally white but every once in a while a darker one is born. It likes to rest on tree bark and the darker ones kept being spotted and eaten by birds. Then when coal plants and other factories popped up the trees in those forest started to become darker. Now the white ones where spotted and eaten while the darker ones where better hidden.
By: Choken1. on 14 Dec 07, 22:01:59
If the situation would favor smaller animals over larger ones then the process would reverse. If food becomes scarce like odeonus mentioned then smaller animal might fair better since they require less food. There can be other causes as well.
By: odeonus. on 13 Dec 07, 20:02:31
if it's not enough food around animals tend to grow smaler, even if the should be biger geneticaly. This works on humans too. Humans 500 years ago were much smaler than now.
By: ZapherJin. on 13 Dec 07, 17:45:11
o ok so what about animals that are big and get small?
By: Choken1. on 08 Dec 07, 15:27:16
Sorry. The link I gave you is not working. Lets try again: upload.wikimedia(dot)org/wikipedia/commons/5/57/Pudu_pudu_AB.jpg Just remember to replace the (dot) with a .
By: Choken1. on 08 Dec 07, 15:21:13
Finally there are hundreds of different species of deer grouped into four subfamilies. Most extreme different examples of deer include: Reindeer, Moose(or Elk), Water Deer and (here's a good one) Pudu. Pudu is the worlds smallest deer and funny enough, he kinda reminds me of a shrew. Just take a look: upload.wikimedia(dot)org/wikipedia/commons/5/57/Pudu_pudu_AB.jpg Who would have thought that they made lug nut shaped cars.