Have you ever wondered why cannibalism isn’t more popular? Just think about it, each animal is made of a complex variety of chemical ingredients. As an animal, we can either try to assemble these ingredients haphazardly, eating other animals and plants and hoping these assorted meals will add up to exactly what we need. Or we can get all our essential nutrients in one complete package by dining on our next-door neighbor! Learn more on this Moment of Science.
Carnivorous plants still rely on photosynthesis as their main source of energy. However, because they grow in areas where the soil lacks essential nutrients, they use the insects they capture as a source of nitrogen and other minerals.