Crocodiles really do produce tears. Because, while eating, they swallow too much air, which gets in touch with lachrymal glands (glands that produce tears) and forces tears to flow. But it is not actually crying. The term “crocodile tears” (and equivalents in many other languages) refers to a false, insincere display of emotion, such as a hypocrite crying fake tears of grief.
The term is derived from an ancient anecdote that crocodiles weep in order to lure their prey, or that they cry for the victims they are eating, first told in the Bibliotheca by Photios I, who was the Ecumenical Patriarch of Constantinople. This tale was first spread widely in English in the stories of the Travels of Sir John Mandeville in the 14th century and appears in several of William Shakespeare’s plays.
Sub-Saharan Africa is the home to the second heaviest land mammal in the world — the hippopotamus. Their dense bodies make it impossible for them to swim, even though they spend most of their time in the water. The body of the hippopotamus is well suited for aquatic life. Their eyes, ears and nostrils are located at the top of their head, so they are able to see, hear, and breathe while mostly submerged.
A clear membrane covers and protects their eyes while allowing them to see underwater. Their nostrils close to keep water out, and they can hold their breath for several minutes. Though they feed on land, hippos do many other activities in the water, including mating and birthing. Groups of 10-30 hippos live together with one dominant male.
During the dry season, the dominant male chooses a partner, and then the other males fight each other for the remaining females.
Eight months after conception, at the height of the wet season, female hippos give birth to one calf at a time, either on land or underwater. Afterwards, mothers leave the herd for a short period of time to bond with their calves underwater. After a few weeks, the calves finally exit the water to feed on grass.