Bulletin of the Atomic Scientists8 小时
An appreciation: How physicist Evgeny Velikhov helped end the US-Soviet nuclear arms race
Evgeny Velikhov's many accomplishments in reducing the threat from nuclear weapons—during and after the Cold War—are ...
来自MSN12 小时
Tigers May Be Orange To Us, But They're Invisible To Prey—Here's Why
A tiger's striking orange and black stripy appearance may make them stand out to humans, but to their prey, they are almost ...