• Highs and lows
  If your body temperature rises or falls by just a few degrees, it can ...

• Warm-blooded
  Human beings are warm-blooded. This means that the temperature inside ...

• Splitting up
  Until you are 18-20 years old, new cells are constantly being made to ...

• Cell science
  No one knew that cells existed until 1665. Then an English scientist, ...

• Amazing But True
  By weight, your cells, and therefore your whole body, are almost ...

• Where is the world’s lowest point on land?
  The shoreline of the Dead Sea, between Israel and Jordan, is 400 ...

• What is the world’s highest peak?
  Mount Everest on Nepal's border with China reaches 8,848 metres ...

• Which is the deepest lake?
  Lake Baikal, in Siberia, eastern Russia, is the world's deepest lake. ...

• What is the largest inland body of water, or lake?
  The salty Caspian Sea, which lies partly in Europe and partly in ...

• Is there a lake under Antarctica?
  Scientists have found a lake, about the size of Lake Ontario in North ...