Seaweed, the common name for many kinds of marine algae. Although the name is sometimes used for all of the marine algae, most botanists restrict the term to the larger algae that are attached or have been attached to the sea bottom. The brown algae, including the kelps, and the red algae are most commonly called seaweeds. Kelp is used as food and as fertilizer in the Far East. Kelp and red algae are frequently used as animal feed in Europe.
If someone tells you he or she possesses the secret of happiness, that person may also have a bridge to sell you. The things that make some people happy may lead to utter despair in others. As it turns out, humans may have to look into themselves to find happiness.
It doesn't take long to watch a movie and figure out who the evil genius is. In real life, though, figuring out if someone made an intelligent decision to do harm is a lot more slippery.