EvolutionMarch 1, 2016
Controversy and Excitement Swirl around New Human Species
An astonishing trove of fossils has scientists, and the media, in a tizzy over our origins
Volume 314, Issue 3
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Features
Space & PhysicsMarch 1, 2016
Dark Energy: No Answers but More Questions
Why is the expansion of the universe accelerating? After two decades of study, the answer is as mysterious as ever, but the questions have become clearer
NeuroscienceMarch 1, 2016
The Brain's Waste-Disposal System May Be Enlisted to Treat Alzheimer's and Other Brain Illnesses
An internal plumbing system rids the brain of toxic wastes. Sleep is when this cleanup ritual occurs
Climate ChangeDecember 17, 2015
The Ominous Story of Syria's Climate Refugees
Farmers who have escaped the battle-torn nation explain how drought and government abuse have driven social violence
BiologyMarch 1, 2016
New Gene-Editing Techniques Could Transform Food Crops--or Die on the Vine
A powerful new gene-editing tool is sweeping agriculture. It could transform the debate over genetic modification
EvolutionMarch 1, 2016
Clusters of Epic Volcanic Explosions Drove Earth's Mass Extinctions
Huge regions with epic volcanic explosions are now blamed for four of Earth's “big 5” mass extinctions
BiologyMarch 1, 2016
How Cells Know Which Way Is Up, Down, Front and Back, Close or Far
From insects to mammals, a small set of genes and proteins controls the orientation of the body’s cells and tissues