Half of All Species Are on the Move—And We’re Feeling It

primack-thoreau1National Geographic
Richard Primack, College and Graduate School of Arts and Sciences

The shrubs probably responded first. In the 19th century, alder and flowering willows in the Alaskan Arctic stood no taller than a small child—just a little over three feet…”

Expert quote:

“Everywhere throughout the world, things are happening earlier in the spring—in China, Japan, Korea, across Europe—those are the strongest signals of all.”

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