Weird question, I'm sure.... How do you know if a skin growth is a mole or if it is a supernumary nipple? It LOOKS like a (small) nipple, no areola, and is in line with where a third nipple would likely be....but it could just be a mole...is there some sort of definitive way of knowing the difference?
posted by polexxia on Jul 22, 2009 - 6 answers

Help me track down and understand the owner of mutation's patent. [more inside]
posted by Sara Anne on Apr 13, 2006 - 13 answers

How do evolutionary changes occur in biology? Is there some sort of "intelligence" that helps a species adapt, or does a species have to wait for a random mutation to occur that just happens to confer an advantage (a mutation that might never even happen)? For instance, how do bacteria become resistant? And are there different theories on evolutionary changes?
posted by Tin Man on Feb 25, 2004 - 22 answers