This week Dear Science ranges all the way from billions of light years away to right down to the microscopic.

Marcus explains to us how scientists are looking at black holes and neutron stars, and whether a black hole can swallow a neutron star whole.

Zooming right in, Marcus talks us through the CRISPR gene and how it is has been tested to treat deadly diseases within the body.

finally, Marcus explains all the controversies around the Dragon Man and other memebers of the human family tree, and whether we should see a restructure.