American West is so dry that the land is rising
If you live out West, you've likely noticed that things have been pretty dry lately. What you probably haven't noticed is that the ground beneath your feet is also a little bit higher in elevation -- an average of 4 millimeters higher, to be exact.
Advances in battery chemistry and hydrogen production may bring affordable zero-emissions vehicles closer to reality
Batteries and hydrogen fuel cells are vying to become the cheapest, cleanest way to power vehicles, in hopes of one day unseating the gasoline engine as the propulsion system of choice. Recent breakthroughs have brought both technologies closer to that goal.