Michael Nietzel is president emeritus of Missouri State University. A Forbes contributor since 2019, he writes about higher education. After earning his B.A. from Wheaton College (Illinois), he ...

But Mother Nature often has more than a few tricks up her sleeve when you’re way out there, and one of her most common is leaving you to traverse a trail strewn with thick, slippery mud.

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Nature asked the world’s largest health-research funders what they are doing to study a life stage experienced by half of humanity. Here is what some of them told us.