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A monkey sits atop a hillside roof with an expansive view of a city and mountains behind him.
A firefighter carries a gear to initiate a controlled prescribed burning in a forest with flames burning close to ground behind him.
The Stone of Hope at the Martin Luther King Jr. civil rights Memorial
Invasive species are threatening Antarctica's fragile ecosystems

Invasive species are threatening Antarctica's fragile ecosystems

Keeping Antarctica pristine is becoming more challenging with growing threats from human activity and climate change.
The link between marine fog and high levels of mercury in mountain lions
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The link between marine fog and high levels of mercury in mountain lions

Scientists have discovered that marine fog in California carries with it high levels of mercury, which they say is being deposited on land and making its way up the food chain.

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Lichens: Hardy organisms warn of pollution and climate change

Lichens: Hardy organisms warn of pollution and climate change

Lichens are strange organisms, with some plant-like features, but which are actually a partnership of an alga or cyanobacterium that makes a home for fungi, which feed their partner with nutrients. They are also a warning sign of the changing climate.

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