1. Watermelons are about 92% water, which makes them one of the most hydrating snacks you can eat on a hot day.

2. They are both a fruit and a vegetable. They are sweet like a fruit, but they belong to the same plant family as cucumbers, pumpkins, and squash.

3. You can eat the whole thing. The seeds and rind are completely edible. In fact, watermelon rinds are often pickled or stir-fried in many parts of the world.

4. They come in weird shapes. Farmers in Japan grow cubical watermelons by placing young melons into square glass boxes so they are easier to stack and store.

5. There are over 1,200 varieties. Watermelons can be red, pink, yellow, or orange inside, and they can grow with or without seeds.

6. They were used as canteens. Early African explorers used watermelons as natural water bottles to carry liquids across dry deserts.

7. Ancient Egyptians loved them. Watermelons were often placed in the tombs of Egyptian pharaohs, including King Tut, to give them a refreshing drink in the afterlife.