Foliage of Acacia Senegal (Senegalia Senegal).

Acacia: A Legacy of Artistry and Extraction

The thorny Acacia tree produces gum arabic, a versatile substance that’s been driving global trade for centuries.
Ridge trail to Mt Lafayette in the White Mountains, New Hampshire

How Did Eastern North America Form?

With many collisions and much crumpling of rock, down the ages. The story holds lessons for how the edges of continents are built and change over time.
Harmattan wind in Senegal

West Africa’s Hazardous Winds

Harmattan carries more than dust—it also spreads disease.
Hellas Chaos on Mars

Mars Time Machine

Researchers are creating advanced simulations that will provide a deeper understanding of Mars’s climatic history and help to determine whether it was once able to sustain life.
Sturgeon

Atlantic Sturgeon Were Fished Almost to Extinction

Ancient DNA reveals how the Chesapeake Bay population changed over centuries.
Sugar maple (Acer saccharum) in The North American Sylva by François André Michaux. Illustration by Henri-Joseph Redouté, 1819.

Tradition in Turmoil: Sugar Maple and Climate Change

With harvests dependent on the spring freeze-thaw cycle, the maple industry is seeking ways to mitigate damage wrought by a changing climate.
United States flag pointing Washington in cheap plastic globe. Shallow depth of field, focus on flag

What Is Isolationism?

The history and politics of an often-maligned foreign policy concept.
Close-up of sourdough starter and flour in jars

The Science of Sourdough: How Citizens Are Helping Shape the Future of Fermented Foods

Citizen scientists are drawing on personal experience to help researchers create new plant-based fermented foods and maximize their health benefits.
The Sun's corona observed in extreme ultraviolet (131 Å)

Colliding Plasma Ejections From the Sun Generate Huge Geomagnetic Storms

Studying them will help scientists monitor future space weather.
A male maratus splendens spider on a stalk of grass.

Tiny Splendid Peacock Spiders

They have the fastest known jump among their kind according to a new study.