Rae Ellen Bichell

This spring, 16 state patrol officers from Colorado and Wyoming took a couple days off their usual work schedule to do something special. They assembled in a hotel conference room in Denver. As instructed, they wore street clothes for their first assignment: going shopping at nearby marijuana dispensaries.

"It's a brave new world," said instructor Chris Halsor, referring to the years since Colorado legalized recreational marijuana.

The European slug is average in every way: slimy, brownish, shorter than a credit card.

But Arion subfuscus has a minor superpower: When it's scared, it can glue itself to wet surfaces very well, and do so while remaining bendy.

Victoria LaBarre was climbing out of a canyon and into a bright, vast, seemingly lifeless landscape when she started to experience an astronaut's nightmare.

"Suddenly," she said, "I couldn't breathe."

Before she confronts death straight on, Melissa Connor always puts on a pair of rubber boots. The shelf she takes the shoes from includes a bottle of hand sanitizer, a sign warning people to check their shoes for scorpions and a bundle of wooden stakes, each of which will eventually be marked with the abbreviation "Mr." or "Ms." followed by a number.

Three people in New Mexico caught the plague, according to health officials there, who reported the two most recent cases this week.

Yes, this is the same illness that killed an estimated 50 million people across three continents in the 1300s, though these days common antibiotics will get rid of it.

In 2010, Sonia Vallabh watched her mom, Kamni Vallabh, die in a really horrible way.

First, her mom's memory started to go, then she lost the ability to reason. Sonia says it was like watching someone get unplugged from the world. By the end, it was as if she was stuck between being awake and asleep. She was confused and uncomfortable all the time.

"Even when awake, was she fully or was she really? And when asleep, was she really asleep?" says Sonia.

It's a mission that's been in the works for nearly 60 years. NASA says it will launch a spacecraft in 2018 to "touch the sun," sending it closer to the star's surface than ever before.

The spacecraft is small – its instruments would fit into a refrigerator — but it's built to withstand temperatures of more than 2,000 degrees Fahrenheit, all the while maintaining room temperature inside the probe.

Animals, especially mammals, need oxygen to keep their bodies and brains humming along.

But leave it to the African naked mole-rat to buck that trend. The rodents are bizarre in just about every way. They're hairless, ground-dwelling and cold-blooded despite being mammals. Now, scientists report in the journal Science that the animals are capable of surviving oxygen deprivation.

Decades ago, scientists surgically attached pairs of rats to each other and noticed that old rats tended to live longer if they shared a bloodstream with young rats.

It was the beginning of a peculiar and ambitious scientific endeavor to understand how certain materials from young bodies, when transplanted into older ones, can sometimes improve or rejuvenate them.

Researchers have found that European eels can sense magnetic fields and may use this ability to navigate thousands of miles through the Atlantic Ocean.

Eels have always been mysterious animals. More than 2,000 years ago, Artistotle proposed that they were born spontaneously from mud.

"I think it's fascinating because as humans we've been pondering the life history of eels for a long time," says Lewis Naisbett-Jones, a graduate student in marine biology at the University of North Carolina, Chapel Hill.