Human beings will be happier - not when they cure cancer or get to Mars or eliminate racial prejudice or flush Lake Erie but when they find ways to inhabit primitive communities again. That's my utopia.
DNA from the animals and plants that populated Siberia and Alaska up to 395,000 years ago has been recovered from specks of permafrost.
The discovery of these genetic fragments - by far the oldest DNA sequences yet authenticated - will give scientists unprecedented power to reconstruct ancient ecosystems and track them through time. The work has already shed new light on the mysterious extinction of the region's large mammals.