Electricity was first discovered about 2 500 years ago. The Greek scientist Thales of Miletus (c. 620 BCE – c. 546 BC) noticed that a piece of amber (the hard fossilized sap from trees) attracted straw or feathers when he rubbed it with a cloth. The word “electricity” comes from the Greek word for amber […]
The Saltwater crocodile and the Nile crocodile are the largest of the 23 crocodilian species. The males grow up to 20 ft (6 metres) long and weigh about a ton. A crocodile’s tongue is attached to the roof of its mouth and it cannot move it, meaning a crocodile cannot chew. It breaks up its […]