Rock climbing may be harming snail populations along the Niagara Escarpment.

How does dam removal restore rivers to health, and how long does it take?

Brown future: New study finds large increase in number of threatened plants, calculates that 22 to 62 percent of plant species are threatened.

Renewable energy and the hydrogen economy get a boost from new invention.

How do current conditions compare to past predictions of the effects of global warming? Are living on a warming planet?

Suspect arrested, may be charged with trying to develop a dirty bomb. What is a dirty bomb, and how badly would it harm us?

African science produces cancer drug, dust, rain and desertification and linguist Joseph Greenberg.

Using butter to track worldwide concentrations of persistent organic pollutants, PCB, DDT.

Wolf returns to Yellowstone National Park through species reintroduction effort. Why bother bringing back native species?

Recycling paper and industrial waste (!) as fertilizer. Just because they call it recycling does not prove it’s a good idea…