One reason that Bjorn Borg was nicknamed "Ice-Borg" was that he never panicked
he had very good manners
all his rivals hated him
he was physically very big
he was very cold towards his opponents
Bjorn Borg was the first teenager to become world-famous
started playing tennis when he was about 11
lost many tennis matches between the ages of 26 and 34
was better-educated than most tennis players
was a world-class player in his early teens
Lennart Bergelin was the coach of the Swedish Davis Cup team
led Borg's team during his first ever cup match
was coached by Borg some years after they first met
beat Borg during his first Davis Cup match
was beaten by Borg during his first Davis Cup
59 SMALL WHALES Dolphins and porpoises, often called simply "small whales," are mammals, not fish, and are thus warm-blooded, keeping their body temperature nearly constant even when they are exposed to different environmental temperatures. The mothers provide milk for the young for a year or more. Like other whales, dolphins have lungs and breathe through a single nostril, called the blowhole, located on top of the head. The blowhole is opened during their frequent trips to the surface to breathe. In contrast to some of the large whales, dolphins and porpoises have teeth, which they use to seize their food, consisting primarily of marine fish. Certain species of marine dolphins are the best-known biologically because they survive well in captivity, which means they can be more carefully observed. The bottle-nosed dolphin has been the most intensively studied because of its adaptability to salt-water holding tanks. It is a major participant in acrobatic shows at oceanariums and is noted for its curiosity toward humans.