Peek Inside the Space Balloon Lifting Passengers 100,000 Feet Above Earth’s Surface

Crucial chemical for life can form in conditions found on early Earth

Last images of ESR-2 satellite look like TIE starfighter from Star Wars. ESR-2 returned to Earth in an uncontrolled reentry this week after nearly three decades (corrected link)

'Intruder' stars have changed Earth's climate over the eons. Here's how.