History of the halo around the sun
After 70 years, a timeline emerges for the mysterious Oort cloud that surrounds our solar system
The ant and the freeloader
An infection makes parasites of those affected, and wrecks harmony in the ant colony
Time to shut off the methane?
Natural gas may not last as long as carbon dioxide in the atmosphere, but it causes more climate change
Dark matter, that galactic drag
Invisible, nearly undetectable, it still manages to slow down the movement of metal-heavy stars
Did fungi save life as we know it?
Research provides evidence they may have pulled the whole planet out of an ice age