Four-time gold medal winner Ben Ainslie today announced his retirement from Olympic sailing.

The British sports star confirmed the news that he will not bid for a fifth Olympic gold medal at the 2016 Rio Games and will now instead focus on his Americas Cup campaign.

Ainslie holds the world record for most Olympic gold medals won by a sailor, having won gold medals at four successive Games. The 35-year-old won the Laser class at Sydney 2000 and picked up gold medals in the Finn class at Athens 2004, Beijing 2008 and London 2012. He also won a silver medal, in the Laser class, at Atlanta 1996.

NASA's Cassini mission has discovered the temperature of Saturn's moon Tethys has hotter regions uncannily like the 1980s arcade game character Pac-Man.

The discovery comes after a similar feature was spotted in 2010 on Mimas, another Saturnian moon.

Scientists say the effect is due to high-energy electrons bombarding the sides of the moons that face their direction of orbital travel.

Billy Mitchell (USA) scored the first "perfect" PAC-MAN game (3,333,360 points) on 3 July 1999. Four more players have since matched it.

Angus T Jones, star of US sitcom Two and a Half Men , has described the show as "filth", while urging viewers not to watch it.

In a video posted online by a Christian group, Jones said he no longer wanted to take part in the show.

The 19-year-old, who plays Jake Harper (aka the "half"), explained that the CBS show's raunchy humour conflicted with his recent bible studies.

Jones currently holds the Guinness World Records title for the highest paid child actor on TV by episode, with a reported fee of $250,000 (£156,620) per show.