Entomology, the study of insects. Scientists specializing in this field are called entomologists. They are chiefly interested in how each kind of insect either harms or benefits humans. They study the origin, development, structure, habits, and distribution of insects. Entomologists work in universities, for government agencies, and in private industry. They have helped chemists develop insecticides, farmers control crop and livestock pests, and physicians conquer diseases spread by insects.
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.