Heat can escape black holes
Black holes create immense vacuum. It was previously believed that the vacuum is empty. However, Stephen Hawking calculated that this is not true and that heat can escape a black hole despite the fact that its gravitational pull is stunningly powerful.

AI is a real scare
Artificial intelligence holds a serious threat to the human race. People should be careful and control the amount of information they give to their equipment and machines. Otherwise technologies will make us their slaves and start to dictate how to live our lives.