太空垃圾

Wherever we humans go, we leave behind a mess. That goes for space, too.人类所到之处都是一片狼藉，太空也不例外。Today, our species is responsible for more than 500,000 pieces of junk hurtling around Earth at phenome

American researchers from Stanford University and the Jet Propulsion Laboratory (JPL) of the US National Aeronautics and Space Administration (NASA) have combined gecko-inspired adhesives and a custom robotic gripper to