I learned this today. Instant coffee was technically invented in 1771, but this wasn’t really instant. Instant coffee that we would recognize today was invented in 1890. These days, instant coffee is coffee that has either been freeze-dried or spray dried. The two methods differ slightly, and freeze-drying is more expensive. When coffee is freeze-dried, […]
#277 When was instant coffee invented? Read More »
I learned this today. Mosquitoes come out at dusk and are active throughout the night because the temperature is lower than during the day, it is easier to find food, and there are fewer predators around. It is not true to say that all mosquitoes come out at night. There are more than 3,000 species
#276 Why do mosquitoes come out at night? Read More »
I learned this today. High energy radiation or long exposure to radiation can damage the DNA in cells and cause radiation sickness. What is radiation? Radiation is energy that radiates from a source and travels through space at the speed of light. It travels as a wave or as particles and has an electric field
#275 How does radiation sickness happen? Read More »
I learned this today. Scaffolding is attached to the building by placing ties through windows, by drilling holes in the brick, or by anchoring them to the ground. Scaffolding has been used for thousands of years. Sockets have been found in the walls around the cave paintings in the Lascaux cave network. These paintings are
#274 How is scaffolding attached to a building? Read More »
I learned this today. The Nazca lines were made using wooden stakes and ropes to make them straight. Then the top layer of soil was removed. How the Nazca lines were made is an easier question to answer than why they were made. First of all, let’s look at what the Nazca lines actually are.
#273 How were the Nazca Lines made? Read More »
I learned this today. The Iron Age started because iron and steel reached the point where it was stronger than bronze, and the Bronze Age collapsed. The Iron Age is the third of the three-age history division of prehistory. It doesn’t have one starting point because it varies from region to region. The earliest start
#272 Why did the Iron Age start? Read More »
I learned this today. Pandas eat bamboo because it is such an abundant food source that they don’t need to fight over food or search for it. There is some argument over when pandas started eating bamboo. The general consensus is that they began to eat bamboo about 6 million years ago. Evidence for this
#271 Why do pandas eat bamboo? Read More »
I learned this today. The Tunguska event was probably a meteor air burst that exploded over Eastern Siberia on June 30th, 1908. Today, as of writing, it is the 114th anniversary of the Tunguska event. Early in the morning of Tuesday, June 30th, 1908, there was a bluish light almost as bright as the sun,
#270 What was the Tunguska event? Read More »
I learned this today. The first lawyers appeared in the Roman Empire in the time of Emperor Claudius who ruled from AD 41 to 54. In ancient time there was no such thing as lawyers. The law was discharged by the king, chief, or head of the group of people. As leaders became more powerful,
#269 When were the first lawyers? Read More »
I learned this today. Vitamins are organic compounds that our bodies cannot produce on their own but that we need to live. Vitamins are organic molecules that we need in small amounts. They all serve different purposes in our bodies. There are 13 different vitamins. They are A, B1, B2, B3, B5, B6, B7, B9,
#268 What are vitamins? Read More »
