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This artist’s impression shows two tiny but very dense neutron stars at the point at which they merge and explode. ESO/L. Calçada/M. Kornmesser

Astrophysicists trace the origin of valuable metals in space, from colliding stars to merging galaxies

Gold and platinum are found in space, created when two stars collide. Astrophysicists can even trace this process further back, to the merger of galaxies.
Treating your ‘good’ arm after a stroke could help you better tackle everyday activities. MoMo Productions/DigitalVision via Getty Images

Stroke survivors can counterintuitively improve recovery by strengthening their stronger arm – new research

Rehabilitation from stroke has traditionally focused on improving the function of the most severely affected arm. But training the other arm might actually lead to more gains.
Infant chimpanzees are out of mom’s reach the majority of the time they descend from the trees. Kevin Lee/Ngogo Chimpanzee Project and Arizona State University

Risks young chimps take as they swing through the trees underscore role of protective parenting in humans

The youngest chimpanzees are the biggest risk-takers. Would humans show the same pattern if adults weren’t keeping such a close watch on little kids?
Why did this community burn one woman’s remains in such a visible, spectacular way? Patrick Fahey

Oldest known cremation in Africa poses 9,500‑year‑old mystery about Stone Age hunter‑gatherers

An ancient cremation would have been a community spectacle in a place returned to and reignited over many generations. What was behind this unexpected funeral ritual?
Everyday tech of modern life can take on sinister dimensions for people with thought disorders. Busà Photography/Moment via Getty Images

Hacked phones and Wi‑Fi surveillance have replaced Cold War spies and radio waves in the delusions of people with schizophrenia

The delusions of people with thought disorders have had consistent themes of persecution for decades. But new technology provides fresh material for the content of delusions.
The effects of traumatic brain injuries go beyond what meets the eye. Naeblys/iStock via Getty Images Plus

Newly discovered link between traumatic brain injury in children and epigenetic changes could help personalize treatment for recovering kids

Some children recover better after traumatic brain injury than others, despite appearing similarly to doctors. Looking at the genetic and cellular level, however, reveal key differences.

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