Sunscreen pill could be available within five years, scientists say
Researchers uncover way coral shields itself against harmful ultraviolet rays and believe it could pave way for anti-sun compound to protect humans
Have we had our fill of water?
We've been told to drink at least eight glasses a day. Celebrities clutch bottles like fashion accessories and children are urged to swig in class. But as Nigella Lawson is outed as an 'aquaholic', is the tide finally turning on the health benefits of H20?
Anti-HIV drug made by GM plants begins trials in humans
The antiviral was manufactured in GM tobacco with a view to using the same technique to slash the cost of other life-saving drugs in the developing world
Our green spaces are priceless
Nicholas Milton: The government's attempt to put a monetary value on nature threatens the existence of our remaining parks and playing fields
UK green spaces worth at least £30bn a year in health and welfare, report finds
First ever full assessment of the UK's natural assets quantifies the benefits – and warns of the cost of failing to protect them
Weatherwatch: hay fever arrives early
Paul Brown on this year's potent mix of warm, dry weather, brisk breezes and air pollution
From the archive, 25 March 1925: Opponents of summer time
Originally published in the Manchester Guardian on 25 March 1925: The bill which proposes to make summer time a permanent institution came before Standing Committee C of the House of Commons yesterday, Mr. E. H. Turton in the chair
Forests U-turn – the Tories should have known better
Alexander Chancellor: I am shocked and amazed David Cameron couldn't see the wood for the trees when it came to selling off Britain's forests
George MacKerron: ‘I can measure how happy you are – and why’
George MacKerron is the inventor of Mappiness, an iPhone app that collates information from thousands of people to find out when, where and why we are at our happiest. Interview by Elizabeth Heathcote
The Livewell diet: it’s cheap, it’s nutritious and it could help save the planet
The Livewell Plate, a weekly menu compiled by nutritionists, sets out the ideal ingredients to balance healthy eating with sustainable food sources, at an average cost of £29 a person