The SPT team focuses on galaxy clusters because they are the largest structures in the universe, often consisting of hundreds of galaxies—they are one million billion times the mass of the Sun.

A 1,098-carat diamond, believed to be the third largest on the planet, has been unearthed in Botswana. The diamond was first discovered earlier this month at the Jwaneng mine, which is operated by ...

After the reported discovery of the world's second biggest diamond in Botswana, a massive 2,492-carat stone by Canadian mining company Lucara, here are other famous diamond discoveries ...