Cell copies are not perfect--the chromosome isn't copied all the way to the tip. That's where telomeres come in handy.
What happens when you place people in isolation for a month?
How do biological clocks, also known as circadian clocks, work?
Medically speaking, it's generally known that when it comes to being pregnant and giving birth, younger is better. Learn more on this Moment of Science.
Why do we age? Science didn't really start investigating that question until the 1960's.
Nestled in your brain is a biological clock that matches the 24 hour clock of a day. However, they may be another clock. Learn more on this Moment of Science.
Lot's of people want to live longer. Find out the key to longevity on this Moment of Science.
There’s a common belief that men can sire children until they die, but that women need to be relatively young to conceive healthy children. But the father’s age affects the child’s health too.