Replacing animal tests does not mean putting human patients at risk ... Almost every type of human and animal cell can be grown in the laboratory. Scientists have even managed to coax cells to grow ...

Cells are composed of cytoplasm containing various organelles, such as the nucleus, in which the DNA is stored, or mitochondria, which participate in energy production. Animal Cells are limited by ...

Advice from an English teacher in Massachusetts for guiding teenagers to think critically but not cynically about the information they consume. By David Nurenberg This collection of interactive ...