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01/10/2014
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01/10/2014
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UK scientists and engineers have devised a smartphone app that can give you an eye test. Add your vote to our poll to let us know what you think...
19/09/2014
18/09/2014
In this month’s Focus: how you'll live in 2054, why stress is good for you, the balloon that'll take you into space, and the latest electric cars reviewed
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Apollo 11 in pictures
Poll

UK scientists and engineers have devised a smartphone app that can give you an eye test. Add your vote to our poll to let us know what you think...

If a smartphone app could offer an eye test, would you use it? If a smartphone app could offer an eye test, would you use it?

UK scientists and engineers have devised a smartphone app that can give you an eye test. Add your vote to our poll to let us know what you think...

Q&A

A full stomach diverts blood to the vessels in the abdomen, to help supply oxygen to the digestive organs and transport absorbed nutrients away. This reduces blood flow to the brain and makes you...

This behaviour is called nyctinasty, and although it is by no means universal, there are lots of other flowers besides poppies that do it. Most of them instigate the closure by pumping water out...

It's where groups of robots are used in collaboration to achieve shared goals. I saw a demo at a conference recently where about 20 robots the size of small toy cars whizzed around like little...

It’s sometimes claimed that certain species have remained completely unchanged for hundreds of millions of years. That’s untrue. Lungfish, Horseshoe crabs, and Lingula ‘lamp...

Radiocarbon dating is based on the fact that different isotopes (forms) of the element carbon, which is found in all 'organic' materials, can be stable or unstable. When an organism dies, it stops...

A lichen is a symbiotic association between a fungus and an alga, or cyanobacterium. Although the fungus body normally completely surrounds the alga, the algal cells aren't actually inside the...

The best source of data on CO2 emissions I've found is CARMA - Carbon Monitoring for Action (www.carma.org). It lists emissions from 50,000 power plants worldwide. It's a significant body of data...

Static builds up on good electrical insulators like plastics. Such materials build up charge readily because they don’t conduct it away. It’s called ‘static’ because...