What I learned this week and what I want to learn soon.

What I learned this week:

• That bats are not cave dwellers but cave visiters.
• The reason some cave dwellers have no pigment in their skin is because there is no sunlight.
• Caves are very well insulated because of the hundreds of meters of dirt on top of them so their temperature stays the same through all of the seasons.

• The land that we stand on is really thin in comparison to the rest of the bowels of the Earth.
• The mantle is probably 300 degrees cooler than the core of the Earth.

What I Want to Learn

• Why is it so hot in the center of the Earth?
• How did the Earth start?
• How do rivers erode the cave rock?

• How long does it take for a cave to be formed?
• How old is the Earth?