Colder winters are needed to cause native Northern trees to
bloom on time for spring, not increased daylight.
A new satellite view down into the fiery mouth of one of the world's most active volcanoes.
Even astronauts can enjoy fall colors, if they know where to look.
The tallest trees on the planet, the coastal redwood, trapped
a record of the Pacific Ocean within their ancient wood.
Even though the California Gold Rush took place more than a century ago, it left a toxic legacy of mercury pollution.
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