Horizon

Horizon

Snowball Earth (2001x5)


Air date: Feb 22, 2001

The controversial theory that for millions of years the Earth was plunged into catastrophe - entirely smothered in ice up to one kilometre thick.

  • Premiered: Feb 1964
  • Episodes: 1201
  • Followers: 91
  • Running
  • BBC Two
  • Thursday at 21