#38 Why was the Berlin Wall first built?
I learned this today. The construction of the Berlin Wall began on the night of Sunday 13th August. A day that is […]
#37 Why did we start using time zones?
I learned this today. Standardized time and time zones weren’t needed until rail travel became popular in the 1850s. Having international time […]
#36 How do kidney stones form?
I learned this today. The most common kidney stones are caused when there are more minerals in the blood than the kidneys […]
#35 How do fireworks work?
I learned this today. Fireworks that are shot into the sky are made up of a stabilizer, a fuse, a charge, and […]
#34 Why do ships float?
I learned this today. Ships float because the density of the total volume of the ship is less than the density of […]
#33 What are the 5 types of civilization?
I learned this today. The Kardashev scale describes five different levels of technological civilization, and we, as a species, haven’t even reached […]
#32 Why do wounds heal with scars?
I learned this today. Scars are left after a wound because the body is trying to put a protective covering over the […]
#31 Why are Neanderthals called “Neanderthals”?
I learned this today. Neanderthals were named after the place where they were found. The Neander Valley in modern Germany. “Thal” means […]
#30 How does a Venus flytrap know when to close?
I learned this today. Venus flytraps know when to close on an insect because of tiny hairs inside them. Venus flytraps are […]
#29 Why will people happily wait in a queue?
I learned this today. Floor indicators were added to elevators in the 1950s in order to distract people while they waited. The […]