CHEMISTRY: One man’s rust is another student’s lesson in chemistry! Great job today with oxidation numbers. Now it’s time to go and practice applying them! Try to do your homework without your notes first. Then go back and check and see what you actually knew. Great way to check up on yourself.
Astronomers have found the closest known black hole to Earth. Its name is Gaia BH1. Astronomers saw stars being tugged by it and and established it as a black hole.
https://www.sciencenews.org/article/closest-known-black-hole-to-earth