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Two Key Things Astronaut Scott Kelly's Body Will Teach Us About Living in Space

We’re all looking forward to interstellar travel and colonizing Mars, but first, we’ve got a lot to learn about how the human body responds to the cold dark void of outer space. Scott Kelly’s stint on the ISS, which ends tomorrow, is helping us answer some critical questions—including what weightlessness does to our…

All the First Aid Stuff That's Changed Since You First Learned It

When was the last time you took a first aid class? The ‘80s? ‘90s? Like everything in the medical field, first aid is constantly evolving, and what you may have learned to do as a first responder 10 years ago could be completely wrong today. Let’s take a look at some of the biggest changes over the last few years.

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