Assume you had a list of different animal species, and you wanted to order it from most intelligent species to least. (1) What measure of intelligence would you use to compare different species--average number of neurons, for example, or ability to solve certain kinds of tests? Or something else entirely? (2) Can you give some examples of how some common farm, food, or pet animals might rank on the list? [more inside]
posted on Jan 25, 2006 - 17 answers

How do species come to have different numbers of chromosomes? [more inside]
posted on Jan 20, 2006 - 14 answers

Is there a limit to scientific advancement? If there is only a certain number of elements to the universe, will there reach a technology plateau?
posted on Jul 17, 2004 - 25 answers

Can fish interbreed like dogs? My SO and I have been talking about dogs lately so the mixed-breed thing has been a regular topic of conversation. Last night we were at a Thai restaurant with a large fish tank and some gigantic fish. Too big for the tank, in my opinion. And that got me to wondering....can different kinds of fish, genetically speaking, be bred with each other? Even if they wouldn't do it on their own (mating rituals, etc.), could they do it with a scientists help?
posted on Feb 24, 2004 - 8 answers