A big European satellite will make an uncontrolled return to Earth Wednesday

Scientists Identify a Universal Optimal Temperature For Life on Earth

European Satellite ERS-2 to Reenter Earth’s Atmosphere This Week

Europa Clipper launches in October, a spacecraft designed to unlock the secrets of Jupiter's moon, which holds twice as much water as all of Earth's oceans combined. “And that ocean has been there for 4 billion years. It's full of chemistry, it's full of energy, and maybe the ingredients for life.”