NASA has found sugars essential for life on Earth in samples of the 4.6 billion-year-old Bennu asteroid. Scientists ...

Will people continue to hike and bike the Arizona Trail? Extreme weather and land use challenges may test the limits.

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With dwindling oversight, cattle are grazing where they’re not supposed to and in greater numbers or for longer periods than ...

The 43-day government shutdown did not produce the outcome that the Democrats said they wanted. In fact, eight of them* caved before getting the president and the Republicans to negotiate on ...

You love your morning coffee and you love the planet. So, you might wonder what your caffeine habit means for climate change.