This, indeed, is one of the eternal paradoxes of both life and literature-that without passion little gets done; yet, without control of that passion, its effects are largely ill or null.
An octopus's main defence against predators such as sharks is to hide and camouflage itself by using certain skin cells to change its color. This can also be used to talk with or warn other octopuses.
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.
