Small changes in policy math can reshape environmental decisions. A new study looks at intergenerational discounting and ...

Far from our solar system, astronomers have finally watched a star consume one of its own planets, catching in real time a process that will eventually reshape, and likely erase, the world we live on.

Pop quiz: Who said it? This generation does not intend to founder in the backwash of the coming age of space. We mean to be a part of it — we mean to lead it. For the eyes of the world now look into ...