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The first man-made object to enter the boundary between the solar system and interstellar space appears to have reached a turbulent zone. NASA's Voyager 1 has hit a spot where the solar wind begins to give way to interstellar space in a cosmic cataclysm known as "termination shock." California Institute of Technology physicist Edward C. Stone, the mission's chief scientist, fills Melissa Block in on the details.

Deforestation in Brazil's Amazon dropped substantially in the first six months of this year, perhaps signaling a reversal after years of losses in the vast rainforest.

Cognitive neuroscientist Irena Arslanova says our brain perceives time but our body shapes how we experience it. She shares how our heartbeat influences whether we experience time moving fast or slow.

The electric car company Tesla is now becoming the self-driving carmaker. Today it releases software to tens of thousands of Model S owners to automate steering, lane change and parallel parking.

Early Tuesday morning, NASA's New Horizons Spacecraft will complete the first-ever flyby of the dwarf planet Pluto. NPR's Geoff Brumfiel reports live from the New Horizons Control center.

Last week, scientists working at the Large Hadron Collider announced the discovery of the "pentaquark" particle, clearing up 50 years of false signals and potential sightings, says Marcelo Gleiser.

Two monkeys with spinal cord injuries were able to move after a wireless implant restored the connection between brain and legs. But any help for people will be years away, researchers say.

The brain usually relies on our senses to navigate. But researchers found that when people experienced virtual teleportation, their brains still managed to keep them on course.

A mouse's brain clears out toxins during periods of deep sleep — including toxins that form the sticky plaques associated with Alzheimer's disease. Could the same hold true for people?