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Scientists find new but tentative evidence that a faraway world orbiting another star may be home to life.

Could discoveries of alien life ever change the human psyche in how we view ourselves and each other?

Could discoveries of alien life ever change the human psyche in how we view ourselves and each other?

Stunned scientists say the extremely rare squid can weigh up to 500kg (1,100lb).

Wildfires 'could spell the end' for rare species such as water voles and hen harriers.

Campaigners release official data showing the most serious pollution incidents in England are double the target.

A climbing pair shatter the record for completing the daunting north faces of a famed trio of Swiss mountains.

Could volcanic ash close down airspace across the UK and Europe bringing the widespread disruption we experienced in 2010.

The sandstorm blanketed southern regions in an eerie, orange haze and shut down airports.

The sandstorm blanketed southern regions in an eerie, orange haze and shut down airports.

The couple is suspected of selling exotic cats online, including protected species such as white tigers.

The couple is suspected of selling exotic cats online, including protected species such as white tigers.

Six women - including pop star Katy Perry - blasted off into space as part of an all-women suborbital mission

Countries break ten-year deadlock to agree measures to reduce commercial shipping emissions.

Countries break ten-year deadlock to agree measures to reduce commercial shipping emissions.

The Big Garden Birdwatch survey recorded the lowest ever numbers of starlings this year.

The Big Garden Birdwatch survey recorded the lowest ever numbers of starlings this year.

A unique study is tracking the development of hundreds of babies whose parents have also been studied since birth.

In the past few days, UK firefighters have been tackling wildfires across the UK.

A toxic algae bloom in southern California has sickened dozens of animals, causing them to have seizures and act erratically.