Scientists at a US meeting have said it is now time to actively try to contact intelligent life on other worlds.

The Deep Space Climate Observatory launches from Florida on a mission to monitor both the Sun and the Earth.

Early results from a major count of farmland birds reveal sightings of several rare species.

Carbon dioxide escaping from the depths of the ocean heralded the end of the last Ice Age, a study suggests.

Dogs can tell the difference between happy and angry human facial expressions, a study suggests.

About eight million tonnes of plastic waste find their way into the world's oceans each year, a new scientific assessment suggests.