You are currently logged out. Please sign in to download the issue PDF.
Early Humans—Not Climate Change—Decimated Africa’s Large Carnivores
Africa once harbored a far greater variety of large carnivores than it does today. Competition with early humans for access to prey may have brought about their decline
The Discovery of Planets with 2 Suns
Astronomers are discovering distant planets that orbit two-star systems, uncovering bizarre and wondrous worlds unlike anything in our solar system
The Reading Brain in the Digital Age: Why Paper Still Beats Screens
E-readers and tablets are becoming more popular as such technologies improve, but reading on paper still has its advantages
Better Security Measures Are Needed Before Drones Roam the U.S. Airspace
Fleets of unmanned aircraft may soon scan terrain for forest fires and deliver FedEx packages. Yet drones' security flaws allow them to be readily hijacked with simple technologies
Book Excerpt: George Johnson Explores the Latest Discoveries about Cancer
Researchers have uncovered processes that make cancer even more complicated than they thought it was
How to Think about Privacy
Making sense of one of the thorniest issues of the digital age
Hot Brines Deep Underground Could Store CO2 and Generate Energy
What if we could tap vast deposits of methane-rich brine deep beneath the ocean and use the energy to cut carbon emissions?