This week, we learned …
… horseshoe crab blood is an irreplaceable medical marvel—so biomedical companies are bleeding 500,000 every year. Read of the week!
Why do horseshoe crabs need compassion?
… how Denmark created the world’s greenest island, and how climate change caused a river to change its course.

… feds face a big obstacle in cybersecurity efforts: geography.

Map by National Geographic
What is the geography of startup cities?
… five ways to make books with unfamiliar contexts accessible.

Photograph by James Stanfield, National Geographic
… why man-eating lions prey on people.

Photograph courtesy the Field Museum of Natural History. Public domain
How do scientists study the behavior of lion populations?
… scientists have created a fluid with negative mass. What?

Photograph by Robert Sisson, National Geographic
Learn a little about our favorite engineer studying fluid dynamics.
… naked mole rats just got even weirder.

Photograph by Joel Sartore, National Geographic
Naked mole rats, too, are part of the Photo Ark.
… indigenous myths carry warning signs about natural disasters.

Photograph by Miguel Hermoso Cuesta, courtesy Wikimedia. CC-BY-SA-4.0
How were ancient storytellers inspired by the world around them?
… scientists have discovered vast systems of flowing water in Antarctica, and a giant trash vortex in the Arctic.

What is the weirdest body of flowing fluid in Antarctica? Blood Falls.
… why a Lagos slum is producing Nigeria’s top soccer stars.

Photograph by Robin Hammond, National Geographic
How does body type matter in sports?
… how a border wall will impact wildlife.

Photograph courtesy Pixnio. Public domain.
What animals bridge the beautiful U.S.-Mexican border? How are scientists studying them?