From Clement Le Lievre
I am excited by the possibilities of DNA ecosystem surveillance (9 July, p 20). I suggest an excellent ecosystem to survey would be the river Ness in Scotland. Not only could we thus get irrefutable evidence of Nessie's existence. We could also establish her gender and whether she has a family.
Subsequently, we could take the technology downstream of the Himalayan rivers of ice to explore the hidden world of the Yeti.
The perfected technique could be applied to any solar sails we may build, so that we can harness solar energy from the one side while seeking evidence of panspermia on the reverse.
Ngongotaha, New Zealand
