Scientists might one day monitor these crucial chemical signals to determine the health of marine ecosystems. ...read more
Before there was oxygen on Earth, there was cyanide. Here’s a look at how a poisonous gas may have been a key ingredient to the birth of life on our planet. ...read more
Chlorofluorocarbons are a potential signature of technological civilizations, say astronomers. And the next generation of observatories could spot them. ...read more
An increasing number of soon-to-be brides are showing off substitute gemstones like moissanite and morganite. Here’s why. ...read more