Baby clownfish, the coral reef dwellers feted in the movie Finding Nemo, appear to lose some of their hearing capacity in water more acidic than normal.

Brazil will increase policing and protection for people at risk in the Amazon after three environmental activists were murdered, officials say.

A UN nuclear safety team on a visit to the country says that Japan underestimated the risk of a tsunami hitting a nuclear power plant.

A Wiltshire mound where the legendary wizard Merlin was purported to be buried is found to date back to 2400 BC.

The World Health Organization's cancer research agency says mobile phones are "possibly carcinogenic" but any link is not certain.

Astronomers release an arresting image of the galaxy NGC 6744, which is described as a "twin" of our own Milky Way.

Skygazers are preparing to observe a partial solar eclipse, which is visible on Wednesday across parts of the Northern Hemisphere.

The US is set to publish plans that will categorise cyber-attacks as acts of war - leading to potential military retaliation.