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![[Un]Natural Selection Ep. 6: Damned If We Do, Damned If We Don't - Vimarsana News](https://npr.brightspotcdn.com/dims4/default/bfe2218/2147483647/strip/true/crop/873x491+4+0/resize/1200x675!/quality/90/?url=https://npr-brightspot.s3.amazonaws.com/73/5e/43f25b3340f48258519efab2ce69/un-natural-selection.jpg)
Over time, people have caused extensive damage to rivers by scouring their banks with logs, channelizing them through towns and cutting them up with dams. In the last 50 years, scientists have discovered removing dams can vastly improve conditions in rivers. But not all dams can come down. Sometimes they are our greatest protection against invasive species.
Over time, people have caused extensive damage to rivers by scouring their banks with logs, channelizing them through towns and cutting them up with dams. In the last 50 years, scientists have discovered removing dams can vastly improve conditions in rivers. But not all dams can come down. Sometimes they are our greatest protection against invasive species.
We asked an expert for his take on some of the biggest questions surrounding March Madness.
Get ready for the wildest three weeks in sports.
![[Un]Natural Selection Ep. 5: Rekindling Wilderness - Vimarsana News](https://npr.brightspotcdn.com/dims4/default/9ced958/2147483647/strip/true/crop/2489x1400+10+0/resize/1200x675!/brightness/0x1/quality/90/?url=https://npr-brightspot.s3.amazonaws.com/92/e4/f4f559be4571bef44dc66b025d66/unnaturalselection-final-1400-v2.jpg)
Most people think of the wilderness as a place untouched by humans, but that’s far from the truth. Evidence stored in tree rings in the Minnesota Boundary Waters affirms an oral history of Indigenous land management through controlled burns. Those intentional fires created one of the Great Lakes’ most popular wilderness destinations.