Grass and Lawns
One of the most common types of plants in the world is grass. Grass is almost everywhere. An enormous part of the landmass on Earth is covered with grass. Grass isn’t just stuff in a field that co...
20 Kesä 202514min
The Russian Revolution
One of the most transformative events of the 20th century was the Russian Revolution. The Revolution was responsible for the downfall of the Russian monarchy and the rise of the Soviet Union. It a...
19 Kesä 202514min
The History of Apples (Encore)
One of the most popular fruits in the world are apples. Apples are associated with the Garden of Eden, pleasing your teacher, and the story of Snow White. They play a role in Greek and Norse mytholo...
18 Kesä 202514min
Desalination
Seventy percent of the Earth’s surface is covered with water… and the vast majority of it is useless for consumption or agriculture. This problem has been known for thousands of years, and for thous...
17 Kesä 202514min
Autogyros
We are all familiar with things that fly in the air. Hot air balloons, dirigibles, blimps, airplanes, and helicopters. However, there is another category of flying craft that most people aren’t famil...
16 Kesä 202514min
Transuranium Elements (Encore)
If you take a look at the periodic table of elements, you will notice something interesting. Go to the bottom and take a look at any element over, say, number 94. You will find a bunch of elements y...
15 Kesä 202515min
Frederick Douglass
In 1818, the man who would go on to become one of the greatest leaders in the cause against American slavery was himself born into slavery. At the age of 20, he escaped bondage and went on to lead on...
14 Kesä 202514min
Blue
Colors are something that we are all familiar with. The colors are among the first things we teach children. What if I were to tell you not every culture has the same colors? By that, I don’t mean t...
13 Kesä 202514min
