Gravitational waves hint at a 'supercool' secret about the Big Bang 

 If the gravitational wave background detected last year came from a "supercool" phase transition around the time of the Big Bang, they hint at new physics. 

https://cdn.mos.cms.futurecdn.net/6845AZoHLoaX3axjAeAKP3.png

https://www.space.com/gravitational-waves-big-bang-theory