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.
Stem cells hold the promise of helping us treat a host of diseases and conditions, from spinal cord injuries to Parkinson's. And yet the use of these special cells is quite controversial -- because of where they come from.
The authors of chain e-mails often tell you to smile more -- with the added claim that it takes more muscles to frown. Ever questioned this piece of wisdom? We've got an answer for you.