Trees

Tree rings are easiest to see in trees that grew in temperate places, because the temperature changes at different times of the year.

Why an Astronomer Turned to Trees to Try to Solve a Celestial Mystery

Andrew Ellicott Douglass's theory of sunspots and climate was wrong, but he still pioneered the science of tree-ring dating

The big tree being prepared for its move in Boise, Idaho.

Watch a 100-foot-tall Giant Sequoia Get Transplanted in Boise

A gift from John Muir, the beloved tree was transferred to a local park by St. Luke's Medical Center so the facility can expand

New Zealand’s Iconic Pōhutukawa Tree May Have Roots in Australia

Fossils belonging to the pōhutukawa’s ancient ancestors were found on the coast of Tasmania

Mateo-Vega (derecha) muestra a los compañeros Emberá y Kuna cómo tomar medidas forestales. De izquierda a derecha, los técnicos indígenas Edgar Gariboldo, Chich Chamarro, Baurdino López, Evelio Jiménez, Alexis Solís. (Sean Mattson / Smithsonian)

Cómo Los Científicos y Grupos Indígenas Pueden Aliarse Para Proteger Los Bosques y el Clima

Compared with the trees, lianas are able to put more energy into the production of leaves and seeds and less towards growing a trunk.

Tarzan's Favorite Mode of Travel, the Liana Vine, Chokes Off a Tree's Ability to Bear Fruit

With lowered fruit production, fewer seeds are dispersed to grow new trees

These Trees Uncover What Plunged Egypt's Climate Into Chaos

Examining tree rings inside the world's oldest trees reveal a seismic event that took place around 3,500 years ago

Torrance Coste of the Wilderness Committee illustrates the immensity of the missing Carmanah cedar in 2012.

How Thousand-Year-Old Trees Became the New Ivory

Ancient trees are disappearing from protected national forests around the world. A look inside $100 billion market for stolen wood

Aspens are one of the American tree species moving northwest.

American Trees are Shifting West

For 86 common species, northwest seems to be best. But why?

The ginkgo biloba or Maidenhair tree has been around for at least 270 million years, making it the botanical equivalent of the shark.

The World Told Through the Eyes of the Ginkgo Tree

By deciding this ancient plant was worthy of their attention, humans ended up dramatically shaping its evolution

Mateo-Vega (right) shows Emberá and Kuna colleagues how to take forest measurements. From left to right, indigenous technicians Edgar Garibaldo, Chicho Chamorro, Baurdino Lopez, Evelio Jiménez, Alexis Solís.

How Scientists And Indigenous Groups Can Team Up to Protect Forests and Climate

A collaboration between Smithsonian researchers and the Emberá people of Panama aims to rewrite a fraught narrative

Treepedia's map of Toronto

MIT’s ‘Treepedia’ Shows How Green Your City Grows

Using data from Google Street View, researchers created an interactive map that measures tree density on city streets

New Survey Estimates Earth Has 60,065 Tree Species

Researchers from Botanic Gardens Conservation International compiled the list, finding that at least 10,000 tree species are at risk of extinction

Underground, all these aspen trees share a singular root system.

Where to Hike to (and Through) the World's Largest Organisms

Some of the largest organisms will surprise you

One of the world's most iconic deserts was once lush and green. What happened?

What Really Turned the Sahara Desert From a Green Oasis Into a Wasteland?

10,000 years ago, this iconic desert was unrecognizable. A new hypothesis suggests that humans may have tipped the balance

The government worker Chandra Rangani tends to the health of Thimmamma Marrimanu.

The Biggest Tree Canopy on the Planet Stretches Across Nearly Five Acres

In remote India, a visit to Thimmamma Marrimanu offers a spectacular lesson in the vital coexistence of living things

National Archives of Korea's Busan Repository

Why South Korea’s National Archive Uprooted 12 Japanese Trees

The kaizuka trees represent a long and complicated history with the country's former colonial occupier

The Pioneer Cabin Tree in 2006

One of California’s Iconic “Tunnel Trees” Has Fallen

The Pioneer Cabin Tree was likely hundreds of years old

Needle drop is one of the traits plant scientists at the Christmas Tree Research Center at Dalhousie University are hoping to improve.

Can Science Produce a Longer Lasting Christmas Tree?

LED Christmas lights make the needles hold on longer, and other discoveries from the world’s only Christmas tree research center

The 45-foot Christmas tree is installed in Boston Common.

A Century-Old Boston Christmas Tree Tradition Costs Canadians Big Money

Turns out that Boston’s city Christmas tree is a very valuable gift

Simple, yet effective.

Why Public Health Researchers Are Looking to Urban Trees

A global study finds they can help cool cities and reduce air pollution—for less money than high-tech answers

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