Snails move more rapidly than previously thought and are responsible for spreading a fatal dog parasite, say scientists.

Nearly 20 million people in China could be exposed to water contaminated with arsenic, a new analysis suggests.

Coastal species such as puffins and little terns could be "seriously affected" by climate change, the National Trust says.

Three killer whales from a west coast community of orcas are sighted off Peterhead and Girdleness in Aberdeenshire.