Between 2 million and three million years in the past, the photo voltaic system encountered turbulence on a galactic scale, colliding with a dense interstellar cloud that will have altered each the local weather and evolution on Earth.

Researchers have solely just lately been in a position to map the trail of the solar by way of our galaxy, notably in relation to the comparatively dense hydrogen clouds that additionally journey by way of the interstellar medium, the huge area between star methods.

Now, a crew led by Merav Opher at Boston College…