In the western part of the US, pine bark beetles have thrived, partly because of changing temperatures.

BBC: Why are the world's older trees disappearing?

It tested this pine bark-derived molecule to see if it blocked the thrombin receptor and found that it did.

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Organic mulches such as wood chips, pine straw or bark have the added benefit of slowly breaking down which adds nutrients to the soil.

CNN: X-rated yards save the environment