Incredibly the human heart beats about 72 times a minute, but in that same time, a hibernating groundhog's heart beats just five times and a hummingbird's heart reaches 1,260 beats per minute during flight.
Amandeep Ubhi
Did you know that the sound can be heard from a distance of 8 kilometres or 5 miles and is used to advertise the animal's presence.
Lillie Mersh
Did you know that in the Hundred Years War - a caltrop was a spiked metal device thrown on the ground to impede wheeled vehicles or (formerly) cavalry horses?
Simran Bashir
An eruption column is a cloud of hot volcanic ash emitted during an explosive volcanic eruption. The ash forms a column that may rise over 40 km!
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