Coronation Street's Tracy Barlow returned to the show in 2002, played by Kate Ford, the fourth actress to take on the role.
Deirdre's daughter came back to wreak havoc on her family and friends, in a run that included passing off her unborn child as meek cafe owner Roy Cropper's.
She also became embroiled in a bitter feud with love rival Karen McDonald. Her comeback culminated in her killing boyfriend Charlie Stubbs and being found guilty of his murder.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
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