Humans and hummingbirds will switch to a second brand only when presented with a third.
Did you know that many small animals that stay in cold environments during the winter go into a brief daily hibernation-like state? Scientists call it torpor. Torpor allows the animals to lower their body temperatures greatly, and their breathing and heart rate are so slow you can barely tell they’re alive. Learn more on this Moment of Science.
Learn about one of nature's coolest animals of all time on this Moment of Science: "Nature's Helicopter".