A Moment of Science
Cell copies are not perfect--the chromosome isn't copied all the way to the tip. That's where telomeres come in handy.
In mammals, the sex of a baby is determined by the chromosomes it inherits from its parents. But, the combination an animal inherits can be quite different.
How did the apple manage to survive what killed off the dinosaurs?
We've all heard rumors that cockroaches can survive, well, anything. But, could they survive nuclear war?
Why do we age? Science didn't really start investigating that question until the 1960's.
According to a study, the longer it takes a woman to get pregnant, the greater her chances of having a boy.
Are you a twin? No, well are you sure? You could be a twin, but the twin is within, or a chimera.
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