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I think it probably has to do with selective mating. Animals choose the biggest strongest animals to propagate the species. The mammals prefer bigger mate; better to defend young, themselves. Also many mammals fight for mates. The bigger, stronger mammals will win the fight, and the mate. Why they became extinct? I don't think there is only one answer. Humans make sense, but we should also consider that maybe the animals got too big for their bodies. Being big means more food, more body mass, more blood flow. Their bodies simply couldn't support themselves There is not enough food to support the population - fierce competition for food and resources. The result? Dieoffs. The bigger animals die off the smaller ones come in, to take their place. Add that with humans; resoursful animals who can use tools and weapons, and view the bigger animals as an excellent source of food, and you might have an accurate picture of what happened.

Actually humans are the third most intellegent life on this planet. Dolphins are the second and mice are the first. Dolphins found a way off the planet just it was destroyed by the Vogons, something humans couldn't do. Mice actually had the earth, really a giant supercomputer, built to determine the question to the answer of the universe (42)

Attaining absolute zero would violate the Heisenberg Princible. If an atom stops moving, as it does at absolute zero, then it's electrons would stop moveing. We would then be able to see where it is and how fast it is moving, which according to the princible is impossible.

Can you eplain this, or provide evidence??

If something moved faster then C, then wouldn't it mess up E=MC^2? If something travels faster then C, then wouldn't it's Mass decrease? That would violate the laws of conservation of energy and matter.

How could something not contain any dimensions in a 3 dimensional world. I could be wrong, but I'm inclined to think that we simply do not have a device to measure l,w and h, so we assume it doesn't have any.

It's hard to know for sure what actually happened. We can discuss and compare physiology and anatomy and extrapolate on that data all we want, but it still can't really prove it 100%. But, would most people agree that Darwin's survival of the fittest law applies here?

Uranium Dating in the rocks estimate that the earth is around 4.5 billion years old. However, because how the earth formed is mostly speculative, we can't know for sure how long the body we know as earth as been revolving around the sun. There could have been matter circiling the sun, that would become our earth long before it actually formed.

Larmarck's theory would say that if a mother dyed her hair blonde, then her children would have blonde hair. I don't trust Lamarck's theory.

Sorry, I did mean acceleration due to gravity. How could you measure the mass of a galaxy?

Computers and Brains work essentially the same way. A neuron is fired on, or it remains off. Computers use binary code in much the same way. According to the singularity theorem, the technology will exsist so that we can upload our conciousness onto a computer. Hence "Singularity" - humans and computers becoming one. For more info see http://www.kurzweilai.net

Be careful that you make a medium thats right for your organism!

I'm starting undergrad school next fall, i'm planning to major in Biochemistry. I've been told that's a good choice for people who want to do bio-research.

How much does gravity have an effect on galaxies pulling on each other? What is the gravity constant for a galaxy?

So couldn't we have been creating black holes ever since we started using particle accelerators, but simply never had the equipment to measure them?

I can think of more herbal supplements for those who can't go to the bathroom, and wish to, interesting question.

Also, the T-Cells keep out other pathogens, but they aren't very succesful against HIV. Replenishing T-Cells wouldn't help with the HIV virus, specifically. But, for temporary relief it would, in theory, work.

http://www.turner-syndrome.com/

Knowledge is power. As humans develop better ways to comminicate knowledge, we will also get possesive over that knowledge. Knowledge is the way to make money. If I have a new invention that will enable me to travel throughout the universe, why would I share that knowledge freely, if I can sell it for a profit. (Not that I'm greedy, but I'm just trying to be realistic). I have a feeling that as time goes on, information will start costing more. You'll see free information websites dissapear.

Thanks for the article, it's very informative

It's not the life span that gives a dog the time to learn, it's the capacity to learn. Dogs have smaller cerebrums then humans, and thus are less capable of intellectual thought (although I wouldn't consider them dumb by any means)

How did you try to synthesize the pheremones?

Lets say you throw a ball in the air, the instant the ball leaves your hand the force you applied to the ball no longer affects it, rather it's Newton's laws, that it tends to stay in motion. The four other forces in nature cause it to slow down. Here's my question. Isn't the throwing of the ball be an kinetic energy transfer from you into the ball? Whouldn't the energy from you throwing the ball still affect it's motion? So even if the force you applied doesn't affect the ball, wouldn't your energy?

Possibly the most interesting thing I ever read on this topic is by Ray Kurzweil and his singularity theory. That is, that because the human brain and computers work the same way (binary - switch on and switch off) that humans will be able to upload their concioussness onto a computer. Check out his website kurzweilai.net or for the specific topic on this forum... http://www.kurzweilai.net/meme/frame.html?m=4