#139 What are the six great mass extinction events?
I learned this today. There have been six mass extinctions on Earth that experts know about. The Great Oxidation Event about 2.4 […]
#138 Did pirates really use the Jolly Roger flag?
I learned this today. The Jolly Roger was the flag used by pirates, but nobody really knows why it was called the […]
#137 What are stem cells and how do they work?
I learned this today. There are different types of stem cells, but they basically work by developing into different types of cells. […]
#136 What is a letter of marque?
I learned this today. A letter of marque was a license from a government for a private citizen to attack and capture […]
#135 How does Bluetooth work?
I learned this today. Bluetooth is a short range, low power technology that can transmit data over radio waves. Bluetooth works on […]
#134 How does Valium (diazepam) work on the brain?
I learned this today. Diazepam is a benzodiazepine drug that works by increasing the amount of a chemical called GABA in the […]
#133 Is coral a plant or an animal?
I learned this today. Corals are animals because they don’t produce their own food. Corals are sometimes thought to be rocks and […]
#132 When did the Mafia come to America?
I learned this today. The first account of a crime syndicate that was an American Mafia was published in the New Orleans […]
#131 How does a machine gun work?
I learned this today. A machine gun works by using the recoil or the gas of the cartridge explosion to reload and […]
#130 Why do we have 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute?
I learned this today. We have 24 hours in a day because of Hipparchus. We have 60 seconds in a minute and […]