Your body's cells are constantly replicating themselves, but the rate of renewal depends on where those cells are located and what they do.
Life's Little Mysteries answers fascinating questions about the world around you and the stuff in it, including wild questions you didn't even know you had.
And check out our "Life's Little Mysteries" podcast, where we answer questions about mysteries big and small — about ancient civilizations; our planet and solar system; the plants and animals that live alongside us; our bodies and how they work; and more. Listen in on Apple podcasts, Spotify and Audioboom.
Like some other metals, copper oxidizes when left out in the elements, but the coloring process is complicated.
More than 70% of our little blue planet is covered by water, but we can only drink a tiny fraction of it. Why can't we drink saltwater when it is all around us?
If the surface of your skin gets too chilly, the brain sets into motion a series of warming tricks such as shivering.
There are a myriad of answers to the question, "why are manhole covers round?" But most of them have to do with functionality and economy.
Soda's effervescence comes from processes that super-saturate the liquid with carbon dioxide, which later escapes from the soft drink as tiny, effervescent bubbles.
Stars appear to twinkle because the light from these distant objects passes through wobbly air in the atmosphere.
Arsenic is a naturally occurring element with properties similar to those found in phosphorus. It is also a deadly toxin that is difficult to detect.
Historians aren't sure where the tomb of Genghis Khan is located, but they’ve made several educated guesses.
The Red Sea takes its name from periodic blooms of a blue-green algae called Trichodesmium erythraeum, which turn the normally vivid blue waters a reddish-brown.
Bursting water pipes are a major concern when winter temperatures drop below freezing. But why do freezing pipes burst?
Stars are born amid turbulent clouds, and their deaths can be just as explosive. But how long do stars live? It depends on the size of the star.
The reasons for prehistory's roster of bigger animals range from dinosaur physiology to mammalian social groups.