Kansas State University offers a few pictures and interesting tidbits on tooth amoebas, the toothbrush-fleeing microscopic parasites found where the teeth meet the gums. These photos and facts are part of a tutorial for...

The MadSci Network, offered through Washington University Medical School in St. Louis, offers a fascinating tour of the human body using digitized images generated by the National Library of Medicine's Visible Human...

This activity is designed as an end-of-year project that incorporates skills such as Internet research and using Biology Workbench. Students should already have learned molecular biology and the basics of virology and...

Methane is a greenhouse gas that is less abundant than carbon dioxide, but has a much more potent effect. It is also a greenhouse gas that is often present in natural systems. Zhuang et al. used computer modelling to...

As governments begin to consider regulation of greenhouse gases, many are turning to market-based initiatives. Such programs assign emitters a certain share of emissions, and allow them to trade for emissions rights in...