These types of presentations are always quite interesting. Thanks.

If 100 people lived on Earth Damnthatsinteresting.mp4

Whew!

When a sperm meets an egg, sparks fly – literally. According to a study published in Scientific Reports, an explosion of zinc fireworks occurs when a human egg is activated by a sperm enzyme. The intensity of the sparks, scientists say, indicates the egg's potential to develop into a healthy embryo. pbx7yzhdo5u61.gif.mp4

Earths core is estimated to be molten for around 90 billion years. The sun is expected to go critical and die in 5 billion years