The hummingbird’s super-fast wing beats are among the most energy-intensive movements in the animal kingdom. Still, the birds can fly 4,000 metres above sea level, where there is very little oxygen. Scientists have now figured out how this is possible.
Strange as it may sound, concrete from your old bathroom can help make our environment greener. This is because concrete has a great ability to bind phosphorus, say the scientists behind a new project.
Smartphones and tablets can be equipped with an app that can help detect potentially blinding deteriorations of the eye. This can even be much more effective than traditional vision tests, according to a Swedish study.