A new analysis finds evidence of widespread contamination of water supplies with amoebas, such as the three Acanthamoeba cells shown here. Each contains many bacteria (some shown, red arrows), which can be toxic to humans. The light circle is a cyst, an amoeba resting inside a heavily protective shell.
Credit: F. Marciano-Cabral/Va. Commonwealth Univ. Sch. of Med.
Even if science can’t make life longer, perhaps a pill can make a long life better
The gene patenting decision from a plaintiff’s point of view
With everyday materials, two research teams conceal ordinary objects
In mating display, male birds match moves to songs
Coverage of the 2013 American Association for the Advancement of Science meeting
The Year in Science 2012
Three-part series on the scientific struggle to explain the conscious self
Tables of contents, columns and FAQs on SN Prime for iPad