Watch Now You Know: Why do plants have thorns? - Streaming Online | iwonder (Free Trial)
Now You Know: Why do plants have thorns?
Now You Know: Why do plants have thorns?

Now You Know: Why do plants have thorns?

1 min • Health & Science, Nature & Environment • 2018

Plants can't run away if they're faced with danger. They need other ways...to protect themselves..
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