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New Study on Zircons Finds Plate Tectonics Began 3.6 Billion Years Ago

May 14th, 2021, 11:00AM
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Abigail Eisenstadt
Zircons are the oldest minerals in the world and come in colors like the rich blue above. Researchers have now used these gemstones to identify when modern plate tectonics began. (Ken Larsen)
Zircon minerals are the oldest-known Earth material. Some formed even before the planet s crust became the rigid continental plates that move according to modern plate tectonics.
New research on ancient zircons suggests that Earth’s modern plate tectonics likely formed around 3.6 billion years ago. The paper, published in the journal Geochemical Perspective Letters, reveals how one of Earth’s defining geologic features likely formed and set the stage for the emergence of life. ....

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Why Plants are Seeding Climate Studies

The National Museum of Natural History’s herbarium is helping botanists research climate-driven changes in plants, their biology and their abundance ....

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How Biominerals are Stepping Stones for Climate Change Research

April 22nd, 2021, 6:00AM
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Abigail Eisenstadt
Many organisms like coral and even people create their own minerals to perform basic life functions. Geologists can study these biominerals to learn more about Earth. (Donald E. Hurlbert, Smithsonian)
Evolving Climate: The Smithsonian is so much more than its world-renowned exhibits and artifacts. It is an organization dedicated to understanding how the past informs the present and future. Once a week, we will show you how the National Museum of Natural History’s seven scientific research departments take lessons from past climate change and apply them to the 21st century and beyond.
Minerals are known for their geologic origins, but they aren’t exclusively made by Earth. For over 3.5 billion years, living organisms have also been creating their own hard parts: biominerals. ....

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What to Expect When the Cicadas Emerge This Spring

April 15th, 2021, 6:00AM
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Abigail Eisenstadt
The periodical cicada species,
Magicicada septendecim, will erupt from the ground this spring in the mid-Atlantic region. The last time the species from Brood X appeared for their cyclical mating cycle was in 2004. (ARS Information Staff, USDA)
When eight inches below the ground warms to 64 degrees, the invasion of the Washington metropolitan region will begin. Countless young cicadas will erupt from the soil, molting into adults who will then buzz nonstop at a decibel level close to the noise of a loud rock concert or a jet engine.
“Probably somewhere in the vicinity of a trillion cicadas will be out. It will be hard to walk outside without stepping on them,” said Floyd Shockley, the collections manager for the Department of Entomology at the Smithsonian’s National Museum of Natural History. “They will be singing all day from approximately 10am to 5pm, every single day. It ....

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Say Hello to the Scientist Caring for Smithsonian's 35 Million Entomology Specimens

Say Hello to the Scientist Caring for Smithsonian's 35 Million Entomology Specimens
smithsonianmag.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from smithsonianmag.com Daily Mail and Mail on Sunday newspapers.

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