MIT scientists find way to more easily map the brain

An image taken with the new expansion microscopy technique, showing neurons in the mouse hippocampus, a portion of the brain involved in memory.

Ed Boyden, Fei Chen, Paul Tillberg / MIT

Researchers have found a controlled way to cause a tissue sample swell to roughly four and a half times its size, making it easier to excamine.

The SpaceX Dragon resupply capsule at the International Space Station in April.

Astronauts flee US side of space station, but no sign of leak

NASA said a computer problem likely set off the alarm rather than escaping ammonia coolant.

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More tips on banishing woodchucks — and moles

R. Wayne Mezitt answers your questions about plants, design, function, and more.

Scientists advance doomsday clock

Atomic Scientists say Earth is now closer to human-caused doomsday than it has been in more than 30 years because of global warming and nuclear weaponry.

Leaks in Boston area gas pipes exceed estimates

The amount of methane leaking is as much as three times greater than previously estimated.

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// The promise and limits of ‘mental health first aid’

New programs are training laypeople to deal with psychological emergencies — but how much do they actually help those in crisis?

Health & wellness

Handling stress at work

Research has found that even short interludes of mindfulness meditation can improve focus and promote more rational decision-making, among other benefits.


// Boston Globe Instagram photos

A live stream of Instagram posts from The Boston Globe photo department.