Experts are still trying to piece together how tornado patterns have changed in the last century and are likely to keep changing as the world gets hotter. A meteorologist explains the eastward shift of tornadoes in the US and how newly vulnerable populations can stay safe.

Also, the Trump administration is slashing personnel and research grants at two dozen federal agencies, including those conducting critical science. Science has long played a key role in the federal government, and government research catalyzed major innovations that led to the Internet and the space program, laying the groundwork for the private sector to move in.

And, for Poetry Month -- the songbirds called vireos have increased in number by more than 50 percent in recent decades, while birds overall are struggling. That was the inspiration for Catherine Pierce’s poem, “What I Want to Believe About the Vireos.”

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