Sharks have outstanding hearing. They can hear a fish thrashing in the water from as far as 500 metres away!

Sound travels up to 15 times faster through steel than air, at speeds up to 19,000 feet per second.

Erosion at the base of Niagara Falls (USA) undermines the shale cliffs and as a result, the falls have receded approximately 7 miles over the last 10,000 years.

AMAZING FACTS