A new rocky planet dubbed a "mega-Earth" has been discovered in a distant star system.
The heavyweight world is up to 17 times more massive than the Earth, scientists announced.
According to scientists, the planet should have evolved over time into a gaseous "mini-Neptune."
Instead, Kepler-10c has managed to remain solid despite being more than twice as old as the Earth.
"We were very surprised when we realised what we had found," said astronomer Dr Xavier Dumusque, from the Harvard-Smithsonian Center for Astrophysics, who has led the research.
The discovery suggests that potentially life-bearing rocky planets may be far more abundant than was thought, and some could be immensely ancient.
Night-time snacking is the result of your genes, according to new scientific research.
Scientists from the Salk Institute in California have found that 'night munchies' are linked to a faulty PER1 gene, which controls the body's sleeping and eating patterns.
If a person's sleeping and eating habits become desynchronised, this can lead to night-time hunger pangs which disrupt sleep and may lead to over-eating and weight gain.
Pfizer's chief executive has moved to calm fears about the impact of his company's proposed takeover of AstraZeneca on British science.
Speaking on a video on Pfizer's website, Ian Read pointed out the strength of the UK's academic institutions, saying:
"When we looked at AZ, we liked their science, We liked where their science is being done, which is in the UK.
"And we know we have good science in the UK in the Cambridge, Oxford, London and other universities."
As the face and driving force behind British attempts to explore Mars, Professor Colin Pillinger became everyone's favourite eccentric British scientist. Today, on news of his death, at the age of 70, his successes and even his heroic failures were remembered and celebrated.
His friend, and ITV News Science Editor, Lawrence McGinty, reports on the man with the stand-out side burns and burning enthusiasm for space:
The family of planetary scientist Professor Colin Pillinger told the BBC his death was "devastating and unbelievable".
The pioneering scientist, who was best known for the ill-fated Beagle 2 mission to Mars, became a professor in interplanetary science at the Open University in 1991.
He also earned a host of other qualifications and numerous awards during his prestigious career.
Planetary scientist Professor Colin Pillinger, who died today aged 70, was most famous for the ill-fated Beagle 2 mission to Mars.
The craft was supposed to land on the planet on Christmas Day 2003 and search for signs of life but vanished without a trace.
It was last seen heading towards the red planet on December 19 after separating from its European Space Agency mothership Mars Express.
Afterwards Prof Pillinger spoke of his frustration at the failed probe, and said there was nothing that should not have worked.
Pioneering scientist Professor Colin Pillinger, who was the driving force behind Britain's Mars lander Beagle 2, suffered a brain haemorrhage at his home in Cambridge.
The professor, who was awarded the CBE in 2003, later died in hospital, a spokesman said.
Planetary scientist Professor Colin Pillinger, who was known for his Beagle 2 Mars mission, has died aged 70.
Common bacteria found in water and soil talk to each other using language in much the same way as we do, scientists have discovered.
The bugs display a level of "combinatorial" communication previously thought to be unique to humans and certain other primates, which involves using two signals together to transmit a message that is distinct from them both.
Until now this type of communication had only been observed in humans and their closest relatives. However, the study published in the Public Library Of Science ONE found that the Psuedomonas aeruginosa microbe is similarly capable using chemicals instead of words.
An Earth-like planet confirmed by Nasa in the habitable zone around the Kelper-186 star has 'potential' to host liquid water - one of the pre-requisites for life as we know it to exist.