The latest stories from the Science & Environment section of the BBC News web site.
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Does the future lie in smaller reactors?
The BBC's Roger Harrabin explains how small nuclear reactors might work - using bags of rice.
The US space agency's Dawn satellite continues to return remarkable images from the dwarf planet Ceres, in particular from its collection of bright spots in Occator Crater.
Foam made by miniature frogs to protect their eggs could offer a clever way to deliver healing drugs to burns patients, scientists believe.
The ash tree is likely to be wiped out in Europe, according to the largest-ever survey of the species.
Scientists have been watching paint dry in experiments they say could improve the performance of everyday items, from sun screen to mobile phones.
With 23,000 panels covering an area the size of eight football pitches, Europe's biggest floating solar farm has begun generating power for the very first time.
Metallic ink was used to write the Herculaneum scrolls, say scientists.
Humans are now putting carbon into the atmosphere at a rate unprecedented since at least the age of the dinosaurs, scientists say.
More needs to be done to ensure the genetic diversity of wild relatives of key food crops are conserved to ensure future food security, a study warns.
Five cheetah cubs are in critical care after being born in rare caesarean section procedure
A bear bone found in a cave may push back dates for the earliest human settlement of Ireland by 2,500 years.
Lord West, former First Sea Lord, says he hopes experts will not choose to call a new polar research ship Boaty McBoatface, after the name tops a public poll.
The Australian and Tasmanian authorities abandon their campaign to allow logging in the Tasmanian Wilderness, a World Heritage site.
In an Oregon laboratory, a two-metre spider web made of aluminium and rope is beginning to unlock how orb weavers pinpoint struggling prey.
A camera has captured the hatching of bald eagles in Washington DC.
High-tech GPS equipment means it is not just the height of Ben Nevis that is being reassessed.
A very hungry caterpillar that devours box plants - a staple of formal English gardens - is named "top pest" of 2015 by the UK's Royal Horticultural Society.
How one of Africa's biggest solar farms could help South Africa solve its energy crisis.
Physicists studying the motion of sperm discover that the little swimmers flock together in tight groups if the surrounding fluid is "viscoelastic".