I saw two episodes of Cosmos. The first one I watched was about lead poisoning. I have learned that lead poisoning is dangerous to us humans. It kills most of your cells, and make us grow stupid. It can also kill you. Just one person convinced the health organization that this is true and a fact. He has even fought the gasoline company to ban it for good. The other episode was about a scientist who tries to find out how old is the planet Earth. It took him almost his whole life trying to find out, but eventually discovered it in his older years. He approximately projected it to be 4.54 billion years old. Both episodes are fun and educational to learn from. I saw from episode 1 to episode 8 this month. I have about four or five episodes left to finish the television series Cosmos. Carl Sagan wrote the book Cosmos.