Tree diversity helps forests buffer extreme heat and cold, study finds
A forest with high tree-species diversity is better at buffering heat peaks in summer and cold peaks in winter than a forest ...
NASA scientists are clocking wildflower blooms to understand our ever-changing planet
NASA research is revealing there's more to flowers than meets the human eye. A recent analysis of wildflowers in California ...
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Tattoos stock illustrations, vectors & clip art
iStock’s ever-growing Signature collection features millions of authentic images—including these awe-inspiring Tattoo illustrations—that you won’t find on any other stock site.