Trees move. They’ve been slowly migrating to new habitats since the last ice age. But these days, they’re having trouble keeping up with climate change, leaving park agencies and forest managers with tough decisions. The Verge Science team went into the woods with an ecophysiologist — and her shotgun — to learn how and why trees migrate, and why it matters.

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0:00 Intro
0:55 How trees migrate
2:28 Collecting leaf samples
5:15 Should we help trees move?

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