Black holes; dad biology; Bulgarian population collapse; poor ancestors; covid vaccine explainer; Music: Tricky; Melody Gardot

1. Everything You’ve Ever Wanted to Know About a Black Hole But Were Afraid to Ask. Exploring these almost incomprehensible astrophysical objects, from which nothing returns (apart from Hawking radiation): tl,dr by the author and astrophysicist, Janna Levin: "The black hole is a not a thing. It is nothing."

2. The biology of dads - ‘The bodies and brains of fa…