Bananas Are Radioactive: Bananas contain potassium-40, a radioactive isotope of potassium. While the levels are extremely low and harmless, this fact makes them slightly radioactive.
Water Can Boil and Freeze at the Same Time: In a vacuum, water can reach a state called the "triple point," where it can exist simultaneously as a solid, liquid, and gas.
Hummingbirds Weigh Less Than a Penny: These tiny birds are incredibly light, with some species weighing as little as 2 grams, less than a single U.S. penny.
Hot Water Freezes Faster Than Cold Water: Known as the Mpemba effect, under certain conditions, hot water can freeze faster than cold water, though the exact reasons why are still debated among scientists.
The Eiffel Tower Can Be 15 cm Taller in Summer: The iron structure of the Eiffel Tower expands in the heat, causing it to grow by up to 15 centimeters (6 inches) during hot weather.
Humans Share 60% of Their DNA with Bananas: Although vastly different, humans and bananas share a surprising amount of genetic material due to common biological processes.
There Are More Trees on Earth Than Stars in the Milky Way: Earth has an estimated 3 trillion trees, while the Milky Way galaxy has about 100 to 400 billion stars.
Sharks Have Been Around Longer Than Trees: Sharks have existed for about 400 million years, predating the first trees, which appeared around 350 million years ago.