You are currently viewing the summary.
View Full TextLog in to view the full text
AAAS login provides access to Science for AAAS members, and access to other journals in the Science family to users who have purchased individual subscriptions.
More options
Download and print this article for your personal scholarly, research, and educational use.
Buy a single issue of Science for just $15 USD.
Summary
In science news around the world, the European Space Agency's new environmental satellite Sentinel-1A sends back its first radar images of Earth, polio spreads farther into Central Africa, China releases new information on its polluted soil, and more.