Hands-on challenge: String around the Earth

Putting science and technology to the test

BBC One

Up close and quizzical

Dallas looks into a mirror

Stand close to a vertical bathroom mirror and move back. Do you see:

  • 1. more of yourself
  • 2. less of yourself
  • 3. the same?
See the correct answer

Science speak

If you start any large theory, such as quantum mechanics, plate tectonics, evolution, it takes about 40 years for mainstream science to come around. Gaia has been going for only 30 years or so.

- James Lovelock, scientist, environmentalist and futurologist (1919-present)

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