X-rays from nuclear explosions can protect Earth from asteroids
An asteroid heading toward Earth can be deflected without ever touching a spacecraft. The trick is to use X-rays to […]
Some fleas do not poop for weeks. This keeps their pools clean
Some tadpoles do not poop for the first few weeks of their lives. At least, this is the case for
Blood pressure can be falsely high if the arm is not positioned correctly
When the arm is in the lap or at the side, a blood pressure reading can be falsely high. But
50 years ago, satellites threatened astronomers’ view of the cosmos
Satellites interfere with radio astronomy – Scientific news, October 5, 1974 In the past, satellites and probes launched by NASA