America's national parks are overrun with cars and visitors – what happened to the spirit of wilderness preservation?
Environmental activists have been jailed, persecuted and spied on. What fuels such an absolute commitment to a cause?
Figurines, fishers, bugs and bats – how things in the world become sacred objects in a museum
In the dark
Dark matter is the commonest, most elusive stuff there is. Can we grasp this great unsolved problem in physics?
Living in space was meant to be our next evolutionary step. What happened to the dream of the final frontier?
Things genes can’t do
Simplistic ideas of how genes ‘cause’ traits are no longer viable: life is an orderly collection of uncertainties
Blue sky thinking
Geoengineers are would-be deities who dream of mastering the heavens. But are humans the ones who are out of control?
Humans have been breeding animals for beauty for centuries. But should we draw the line at genetically modified pets?
A flowered planet
For all their intricate symbolic force, from the Paleolithic to today's herbalism, plants are still a deep mystery to us
Walking on oil
East Africa is the world's latest hotspot for oil and gas exploration. Will this be a boon or a curse in arid Turkana?