Mystery of Ultrastrong Roman Concrete Solved
Scientists analyzed the chemistry of the ruins from four sites along Italy’s Mediterranean coast, discovering that the Roman concrete was made of rare volcanic ash, minerals, lime, and chunks of volcanic rock.
Why Elephants Can’t Run 373 Miles Per Hour
Sperm Count is Decreasing in Rich Nations—and No One Knows Why
An obvious decrease in sperm count amongst richer nations is showing no sign of slowing.
Can Government Keep Up with Artificial Intelligence?
Artificial intelligence research is moving quickly. Can the government move quickly enough to effectively regulate it?
Can Cheap Computing Put the Internet Everywhere?
To make the Internet of Things possible, computer chips will need to get cheap, fast.
Anyone Can Be Trained to Hallucinate, and That’s Teaching Scientists About Perception
We may all be susceptible to hallucinations—and they’re not that different from how our brain interprets actual events.