In at third was Luxembourg, the capital of the tiny landlocked country of the same name .
Serving up such an impressive array of contrasts, unrivalled by most European cities, Luxembourg has grown from its beginnings as "Lucilinburhuc" the seat of Siegfried (the first Count of Luxembourg) to the prosperous metropolis it is today.
Thousands of years of turbulent history now offers tourists plenty to see and do as the city's silhouette towers above the impressive remains of the historic fortress.
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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