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Updated: 14 hours 41 min ago
EXCLUSIVE: The challenge consists of four images. Right click on each image and choose 'Save as'. Then you’ll need to manipulate the image to reveal a hidden code inside.
2013 was the year of the Twitpic with astronauts on the International Space Station sharing hundreds of incredible images of Earth from space.
The extended period of warm and dry weather also saw a boom in moths, bees, crickets and grasshoppers, despite the cold, late spring.
European researchers and large engineering groups, such as Rolls Royce, claim crewless ships would be cheaper, safer and more efficient.
The device, created by Dean Verhoeven from North Carolina, maintains drinks at a temperature of 55°C for up to three hours.
Scientists in California found that tiny diamonds thought to be 4.3billion years old were actually synthetic diamond polishing grit used to clean crystals.
Scenes in games like Pay Day 2 (pictured) include women tied to train tracks and a man's kneecaps drilled - a far cry from the innocent mushroom-collecting of Super Mario, writes TANITH CAREY.