#767 When did Britain become an island?
When did Britain become an island? It was connected to continental Europe by a land bridge that was destroyed 450,000 years ago. Some of the land bridge returned and that…
When did Britain become an island? It was connected to continental Europe by a land bridge that was destroyed 450,000 years ago. Some of the land bridge returned and that…
Why does ice have so little friction? Because there is a very thin layer of water on top of the ice. Although, the reason for that is not completely understood.…
How have sea levels changed over time? Over the last 542 million years they have varied from 130 m lower than their level today to a theoretical 300 m higher…
Do all liquids expand when they freeze? No. Water is the only liquid that expands when it freezes. There are four states of matter: solid, liquid, gas, and plasma. As…
How do glaciers move? Glaciers are pulled downhill by gravity. A glacier is a river of ice that is flowing downhill. A river is a body of water that flows…
I learned this today. Antarctica is a polar desert because it has less than 250mm a year of precipitation, which is the set amount to be classified as a desert.…
I learned this today. Pykrete is a frozen material made of 14% sawdust and 86% water. It is as strong as concrete. Pykrete was put forward during World War II…
I learned this today. In the 1930s, the introduction of the refrigerator into homes put the ice harvesting industry out of business. Any kind of food, be it meat, fish…