The latest stories from the Science & Environment section of the BBC News web site.
Updated: 37 min 11 sec ago
One of the biggest scientific claims of the year has received another set-back, putting the result of a bet between two significant physicists in jeopardy.
A material dubbed the darkest substance on earth is being used creatively by internationally acclaimed artist Sir Anish Kapoor.
Patricia Hewitson from Exmouth, Devon, unwittingly grew a 5ft (1,5m) tall cannabis plant from a pack of bird seeds - but her error was only revealed when she contacted a radio phone-in show.
Liberia is to become the first nation in Africa to completely stop cutting down its trees in return for development aid.
The presenter and physicist Brian Cox says he supports the idea that many universes may exist.
World leaders including US President Barack Obama are holding what they say is a crucially important summit on climate change at the UN in New York.
The Rockefeller family, which made its fortune from oil, is to sell its investments in fossil fuels and put money into clean energy.
How lasers have revealed an ancient city beneath the forest
Scientists at the American Museum of Natural History and taxidermy experts have preserved Lonesome George, the last Pinta giant tortoise, who died in 2012 in the Galapagos Islands.
Researchers meet in London to discuss sea-ice trends, as the Arctic reaches its summer low extent and the Antarctic pushes on to another record high.
Ban Ki-moon wins hearts on the street, but will charm work on leaders?
A project is under way calling for people with memories of the excavation if the Temple of Mithras to come forward to tell their stories and share their pictures of the event.
The famous experiment in child psychology from the the 1960s which became known as the marshmallow test has been updated by the experiment's inventor, Walter Mischel.
Street protests demanding urgent action on climate change have attracted hundreds of thousands of marchers in more than 2,000 locations worldwide.
Scientists who claimed to have found evidence for a cosmic super-expansion just after the Big Bang underestimated a key confounding factor in their research, according to a new analysis.
Secrets of ancient burial site keep Greeks guessing
The pan that aims to eliminate guesswork from cooking
US satellite arrives in orbit around the Red Planet
Worldwide demonstrations ahead of a UN meeting in New York on how to reduce global carbon emissions attract hundreds of thousands of people, organisers say.
Do all the world's ants really weigh as much as all the humans?