How is honey made?

»> Bees have glands in their heads that secrete two enzymes: invertase and glucose oxidase. Honey is formed by the reaction of these substances with nectar collected from flowers. Invertase converts sucrose – the type of sugar contained in nectar…

What are stalactites and stalagmites?

»> They are the easiest mineral formations to be found in caves. Stalactites hang from the ceiling in the form of pointed cones. Stalagmites, on the other hand, look similar, but grow in the opposite direction, from the ground up.…

Why do men have nipples?

»> Because every mammal, whether male or female, has glands specialized in producing milk. In most species, evolution made these glands concentrate in the nipples, allowing the liquid to come out only when the puppy sucks on the breast. In…