Table of Contents April 2019

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Lush forests. A vast sea. Millions of years ago, Utah's mountains were surrounded by a verdant landscape. And through it stalked that most ferocious of dinosaurs, Tyrannosaurus rex. But the reptile's reputation as a cold, lone killer is coming into question as thousands of new fossils — literal tons of bones — emerge from a brand new site in the desert. Tyrannosaurs likely actually lived in familial groups, paleontologists think, and juveniles may have run together in packs as they learned to hunt.

Our cover story this month, from editor Eric Betz, takes you through the new world of the tyrannosaurs. After that, you can dig into fresh new stories on the future of food, interstellar travel and more. Enjoy!

Digital editions

FEATURES

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A smiling face might not signal what we think, if there’s anything to be learned from other primates.

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Long considered science fiction, leaving the solar system and speeding amid the stars may soon be within reach.

Raising-the-Steaks

There are 7.5 billion of us and counting. Dutch researchers are working to feed us all sustainably — without any meat

DEPARTMENTS

headinmud

Why we sometimes choose not to know.

DUNE

Researchers hope an underground experiment will reveal an elusive particle.

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Subtle signs indicate that something's not quite right about this fever.

Grizzly-Bear

Researchers say the bears could be reintroduced to the West Coast — if the region can bear it.

fourseasons

Thank our wobbly planet for our seasons, which have led to remarkable adaptations in animals ranging from honeybees to lungfish.

humanadaptclimates

Our unique adaptability may explain why we’re the last humans on Earth.

THE CRUX

Meet the T-Rex Family

Scientists rethink the social network of the iconic predator and its ancestors.

Relocating historic structures can be tricky business.

One researcher's push to understand how an ancient yoga technique can change our cells.

Experts debate whether people or probes make the best space explorers.
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