Mystery 'alien' noises have been baffling people across the globe from Sweden to America to Belgium - and now they have popped up in Nottingham, England. Stunned Calvin Kirlew recorded footage on ...

The Mariana Trench is one of the most mysterious places on Earth. Measuring almost seven miles (37,000ft) deep, the trench sits on the floor of the Pacific Ocean and is so difficult to reach that just ...