May 26, 2017, 1:13 p.m. by Mary Jo DiLonardo
Olga Kotelko didn't take up track and field until she was 77 years old.
Are you a morning lark or night owl? This online test reveals how you compare
March 31, 2017, 8:42 p.m. by Bryan Nelson
Science-backed online test is part of an expansive study on sleep patterns.
What's in that smoke from the Atlanta highway fire?
March 31, 2017, 4:57 p.m. by Lloyd Alter
PVC puts out a lot of nasty stuff when it burns, and it's probably still in the soot.
100,000 people die in China every year so you can buy cheap goods
March 29, 2017, 5:57 p.m. by Bryan Nelson
We knew that air pollution from manufacturing is bad in China, but we didn't know it was this bad.
15 houseplants for improving indoor air quality
Disinfectants: A guide to killing germs the right way
When is the best time to shower?
Olga's legacy: The brain of a famous athlete in her 90s still revealing clues about longevity
Natural ways to get rid of insects in your home
10 of the best pets for allergy sufferers