Various Buddhist sects have arrived in Japan from Asia (above all from China) at different times. After the 12th century the most popular of these was Zen, but other sects have continued to attract followers and have waxed and waned in popularity. Most of these have themselves become divided into various schools.
The Arabian peninsula is a hot and dry climate with few oasis.
<span>The scientific study of the human population is demography</span>
