"Mars is waiting to be discovered, not by clever robots and rovers, but by living, breathing, walking, talking, caring and daring men and women," the ex-astronaut wrote.
Should you wash raw chicken before cooking? The advice from the Centers for Disease Control and Prevention proved controversial.
The source of water on Earth and other planets like Mars is hotly debated in the planetary science community.
"It is happening faster than anyone predicted," said one of the researchers in a new report.
Aquatic invasive species pose a grave and growing threat to the Yellowstone ecosystem.
Box jellyfish stings are excruciating and occasionally deadly. Scientists have now identified a common, cheap drug that is already on the market and which could be a treatment candidate with further development.
The disappearance of Malaysia Airlines Flight MH370 in 2014 is one of the biggest mysteries in the history of aviation.
In a "bee treadmill" experiment, the pesticide reduced the length of time and distance that the insects could fly.
Apohis is set to whiz past Earth at a distance of 19,000 miles in 2029.
The footprint is among the oldest evidence of human settlement in the Americas.
The idea of wormholes was predicted by Einstein's theory of general relativity in 1916.
The gruesome execution took place 2,000 years ago on the Greek island of Thasos.
"The finding of these sites extends by several millennia the history of human occupation of southwestern Amazonia," José Capriles said.
Kissing bugs can transmit a parasite that causes Chagas disease, a potentially serious illness.
Alligator gars are often referred to as "living fossils" because they have not changed much since the time of their earliest ancestors.
This year, there have been 667 confirmed cases of measles in the U.S.
Scientists know very little about the enigmatic Araguaian river dolphin.
A DNA study has cast new light on the genetic diversity of the Crusaders.
"In the 20 years since I first started talking about the impact of climate change on our world, conditions have changed far faster than I ever imagined," the British naturalist and broadcaster says.
"Older people's memory got better up to the level that we could no longer tell them apart from younger people," said the study's lead author.
Cloud forests are among the world's most biodiverse ecosystems.
We often make judgments about how sexually faithful someone is based on that person's face.