• Has flesh ever been preserved as a fossil?
  In Siberia, woolly mammoths, which lived more than 40,000 years ago, ...

• What are spits?
  Waves and currents transport sediments along coasts. In places where ...

• What is eohippus?
  Eohippus is the name of the dog-sized ancestor of the horse, which ...

• How can people slow down wave erosion?
  Along the beaches at many coastal resorts, walls are built at right ...

• How quickly is the land worn away?
  Scientists have worked out that an average of 3.5 cm (1.4 in) is worn ...

• What is a baymouth bar?
  Some spits join one headland to another. They are called baymouth ...

• What are stalactites?
  Water containing a lot of calcium carbonate drips down from the ...

• What are pot-holers?
  Pot-holes, or swallow holes, are holes in the ground where people ...

• What are stalagmites?
  Stalagmites are the opposite of stalactites. They are columns of ...

• Does water react chemically with other rocks?
  Water dissolves rock salt. It also reacts with some types of the hard ...