Editor's note: This report includes disturbing descriptions of abuse.

Last June, a jury found former Milwaukee police officer Dominique Heaggan-Brown not guilty of first-degree reckless homicide. Now, Heaggan-Brown is taking a plea deal over separate sexual assault allegations that led the Milwaukee Police Department to fire him.

The shooting death of Sylville Smith, a 23-year-old black man, ignited riots in the north side of Milwaukee in August 2016.

A tablespoon of soil contains billions of microscopic organisms. Life on Earth, especially the growing of food, depends on these microbes, but scientists don't even have names for most of them, much less a description.

That's changing, slowly, thanks to researchers like Noah Fierer, at the University of Colorado, Boulder. Fierer think microbes have lived in obscurity for too long. "They do a lot of important things for us, directly or indirectly, and I hope they get the respect they deserve," he says.

It wouldn't make any sense to send a French-speaking refugee to a German-speaking town in Switzerland.

But under Switzerland's current system of placing refugees, that's a situation that can easily happen. This problem isn't unique to Switzerland, and it's not the only kind of mismatch that might happen.

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

MARY LOUISE KELLY, HOST:

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

MARY LOUISE KELLY, HOST:

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

KELLY MCEVERS, HOST:

Attention Drivers: Many of those those freeways you're using may not be free for long. Several states are opening new toll roads this year and rates on many existing turnpikes and tollways are going up.

And the number of toll roads is likely to increase, as the Trump administration's infrastructure plan may force many more states to use them to fund long-standing transportation needs

Researchers say they have taken a step toward developing a blood test that would detect eight common cancers, possibly even before symptoms appear.

As they report Thursday in the journal Science, they're hoping their idea would eventually lead to a $500 test that can screen for cancer and identify people with the disease when it's in its earliest stages and more treatable.

But they have a long way to go.

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