Astronaut Scott Kelly, NASA's space-endurance champ who returned to bitterly cold Kazakhstan on Wednesday, said it was "amazing" to feel the cold air when the hatch of his Soyuz capsule popped open after touchdown. Both Kelly, 52, and Russian cosmonaut Mikhail Kornienko, 55, yearned for nature throughout their 340-day mission at the International Space Station, a dry run by NASA for eventual trips to Mars.

β€” The Associated Press