The lowness of grasses. Never brag of being strong. The axe doesn't worry how thick the branches are. It cuts them to pieces. But not the leaves. It leaves the leaves alone.
Most snail species have a ribbon-like tongue called a radula that contains thousands of microscopic teeth. The radula works like a file, ripping food up into tiny pieces.
Some plants are carnivores, gaining nutrients by eating various small insects and spiders. A well known example of a carnivorous plant is the Venus Flytrap.
Alkali metals such as sodium, potassium, rubidium, caesium and francium are extremely reactive elements, just putting them in water can result in an explosion! They are carefully stored in oil to prevent this happening.
While aluminum is the most common metal found in the Earth's crust, the most common metal found on Earth is iron, mostly because it makes up such a large part of the Earth's core.
