The earliest explorers of the arctic regions were trying to find a northwest passage to Asia for commercial purposes. By the time Roald Amundsen of Norway succeeded, easier commercial routes to Asia had been found. Explorers from many countries kept trying to reach the North Pole simply to be the first to get there. Flowers have a variety of ways, some very unusual, of attracting insects to help pollinate them. One variety of orchid has the appearance of the female of one type of spider and thus attracts passing male spiders of this species, who move from one orchid blossom to another, pollinating them.
Chamber music is written to be played in a small-audience hall.
Originally, it was meant for performance in a private home, thus its name. The number of performers, or instruments, varies, but there are rarely more than eight or nine. A symphony orchestra is a large group, often having over a hundred musicians. In the United States, the federal government and the state governments have built fish hatcheries and nurseries to provide small fish for restocking natural fishing areas. Fish eggs are sometimes recovered from natural fishing grounds and sometimes are taken from live fish.