Botany, the science of plants. Botany is one of the major branches of biology, the science of living things. Other major branches are zoology, the science of animals, and microbiology, the science of microscopic organisms.There are more than two hundred thousand plant species throughout the world.
Can you catch someone else's joy like you can catch a cold? Some researchers say that happiness is infectious -- and which people in your social network spread it best might surprise you.
Severe acute respiratory syndrome or SARS is back in the news. A second case has been confirmed in China in the southern province of Guangdong. Learn about this potentially lethal condition.