Eating less meat would be good for the Earth. Small nudges can change behavior

Hidden Depths: Uncovering Theia’s Mysterious Remnants Inside Earth

NASA needs $1 Billion 'Space Tug' to Deorbit ISS. Since the 356-foot-wide laboratory is too big to completely vaporize if left to naturally burn in Earth’s atmosphere, the space agency intends to send a US spacecraft to help deorbit the station and direct its reentry over the South Pacific.

Next Generation Space Telescopes Could Use Deformable Mirrors to Image Earth-Sized Worlds