Latest about Life's Little Mysteries
Why does metal squeak?
Squeaking metal can be grating on the nerves, but it serves an important purpose.
Why do only some animals have periods?
Humans are not the only organisms that have periods — some animals do too, but scientists still aren't sure why.
Why do you feel less hungry when it's hot out?
We know that people in colder environments eat more calories. But why does our hunger abate in the heat?
What were the first animals to have sex?
Animals have been reproducing sexually for hundreds of millions of years, but not always like we do it.
How many galaxies are in the universe?
If we can see at most 3% of the universe, how can we estimate the total number of galaxies in it?
Why do strawberries have seeds on the outside?
While it may initially appear that strawberries are fruits covered in seeds, this is not actually the case.
Why do we see colors that aren't there?
Here's how our brains construct color in our environment.
Will we ever reach Alpha Centauri, our closest neighboring star system?
Visiting our nearest stellar neighbor will take near-light-speed travel.
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