Flight of the methane hunters

At just a bit over crop duster height, University of Michigan researchers are flying through a 50-square-mile hotspot of the greenhouse gas methane over the U.S. Southwest.

No tornadoes reported anywhere across US in March

With only about two-dozen twisters recorded so far this year during a period when 100 or more are typical, the U.S. appears to be in a tornado drought as cool, stable air prevents the ingredients of the violent storms from ...

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