NASA's OCO-2 satellite observed carbon dioxide response to one of strongest El Niños on record.
Scaredy cats, we got you.
A trip to a National Park will change you.
How does Harvey compare to 2005's Hurricane Katrina, one of the deadliest storms to ever strike the U.S.?
A total solar eclipse that will sweep across the United States on Aug. 21 is expected to make a noticeable dent in solar-energy collection, prompting energy workers to concoct workarounds that will help them meet energy demands.