Mental_floss Blog » 6 Animals That Show Mother Nature’s Sense of Humor. You've heard jokes like these all your life: What do you get if you cross an octopus with a cow? An animal that can milk itself. I didn't find such an animal, but the world has plenty of strange species that at first glance appear to be hybrids of unrelated species because they have attributes that surprise us. However, we are only surprised because our personal experiences don't encompass all that nature offers.
Artificial selection in the lab. Artificial selection in the lab For thousands of years, humans have been influencing evolution, through changes we have caused in the environment — and through artificial selection in the domestication of plants and animals.
In many cases, scientists have carefully documented evolution through artificial selection in the lab. John Endler performed experiments in microevolution, allowing artificial selection to manipulate the spots on guppies. Guppy spots are largely genetically controlled. Spots that help the guppy blend in with its surroundings protect it from predation — but spots that make it stand out help it attract mates. Animal Sleep.
Most animals have a daily pattern of rest and activity.
Some animals are more active during the day (diurnal) and some are more active during the night (nocturnal). How much time do animals spend sleeping?