Did A ‘Giant Molecular Cloud’ Kill Off The Dinosaurs?

A new study proposes that the dinosaurs were killed off due to severe global cooling caused when the Earth passed through a ‘giant molecular cloud.'

An asteroid is commonly believed to be responsible for the mass extinction that wiped out the dinosaurs around 65 million years ago, but a new study points out another possible cause. 
A team of researchers in Japan argues that the Earth’s prolonged collision with a dense, dark cloud provides a better explanation for the catastrophic event. 
They believe that global cooling occurred as a result which, New Scientist reports, “would also have destroyed the ozone layer and halted photosynthesis.” 
This Nebula Winter, as the team c