Gravitational waves

Einstein's gravitational waves detected in landmark discovery

 

The researchers said they identified gravitational waves coming from two distant black holes - extraordinarily dense objects whose existence also was foreseen by Einstein - that orbited one another, spiraled inward and smashed together at high speed to form a single, larger black hole.

http://www.reuters.com/article/space-gravitywaves-idUSKCN0VK1RT