1) The tongue of a blue whale is so big that about 50 people could stand on it.

2) The world's largest ocean, the Pacific Ocean, covers an area of approximately 63 million square miles.

3) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.

4) The largest known dinosaur, Argentinosaurus, weighed around 70-100 tons and measured up to 100 feet in length.