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Postpartum depression affects approximately 1 in 8 mothers in the U.S. Postpartum psychosis is far more rare, occurring in about 1 in every 500 deliveries. Justin Paget/Stone via Getty Images

Rare and tragic cases of postpartum psychosis are bringing renewed attention to its risks and the need for greater awareness of psychosis after childbirth

Postpartum depression can strike days, weeks or months after delivery, and the much rarer cases of psychosis can be difficult to detect.
A large robot, loaded with sensors and cameras, designed to explore the ocean twilight zone. Marine Imaging Technologies, LLC © Woods Hole Oceanographic Institution

Scientists envision an ‘internet of the ocean,’ with sensors and autonomous vehicles that can explore the deep sea and monitor its vital signs

The ocean twilight zone could store vast amounts of carbon captured from the atmosphere, but first we need a 4D monitoring system to ensure ramping up carbon storage does no harm.
Permafrost and ice wedges have built up over millennia in the Arctic. When they thaw, they destabilize the surrounding landscape. Michael Robinson Chavez/The Washington Post via Getty Images

Thawing permafrost is roiling the Arctic landscape, driven by a hidden world of changes beneath the surface as the climate warms

Ground is collapsing and massive lakes are draining in a matter of days. Thawing permafrost is having profound effects on the region and its infrastructure.
This man visited the Soviet embassy in Mexico City while Lee Harvey Oswald was in Mexico in 1963. Officials thought it might be Oswald. Corbis via Getty Images

JFK conspiracy theory is debunked in Mexico 57 years after Kennedy assassination

In 1967 a Mexican reporter told the CIA he had met Lee Harvey Oswald in Mexico City just before the JFK assassination. New research and recently declassified intelligence pokes a hole in his story.

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