Science

September 19, 2019 2:06 PM

North America has lost 3 billion birds, scientists say

Researchers estimate that the bird population has fallen by a quarter since 1970. More than 90 percent of the loss can be attributed to just a dozen bird families, including sparrows, blackbirds and finches.

by Nell Greenfieldboyce

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September 18, 2019 2:49 PM

Deadly brain cancers act like 'vampires' by hijacking normal cells to grow

Researchers say certain brain cancers tap electrical signals from healthy cells to fuel their growth. The finding could lead to treatments for deadly tumors like the one that killed Sen. John McCain.

by Jon Hamilton

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September 17, 2019 6:03 AM

Meet the nuclear-powered self-driving drone NASA is sending to a moon of Saturn

Almost everyone who learns about the project thinks it sounds "crazy," admits one scientist. But the technology should work.

by Geoff Brumfiel

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September 15, 2019 7:30 AM

A fire lookout discusses what's lost in a transition to technology

The number of manned fire lookouts in the U.S. is dwindling, as technology is increasingly used to spot and monitor wildfires. But can technology fully replace the human eye?

by Nathan Rott

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September 13, 2019 7:27 PM

Brainerd School Board president questions teaching evolution to students

The theory of evolution and whether or not it should be taught to Brainerd School District students popped up during a board meeting this week.

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September 13, 2019 2:37 PM

Wild deer in Stearns County fall prey to midge-borne virus

The Minnesota Department of Natural Resources confirmed that two wild deer in Stearns County tested positive for epizootic hemorrhagic disease, a virus spread by insects called midges.

by Mohamed Ibrahim

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September 3, 2019 6:00 AM

As rising heat bakes U.S. cities, the poor often feel it most

Hotter neighborhoods tend to be poorer in dozens of major U.S. cities. That extra heat can have serious health effects for those living there.

by Meg Anderson and Sean McMinn

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September 2, 2019 11:20 AM

Amateurs identify U.S. spy satellite behind President Trump's tweet

The satellite is believed to be among America's most advanced. Some believe it's as large as the Hubble Space Telescope.

by Geoff Brumfiel

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August 31, 2019 11:27 AM

Tips for spotting the northern lights, from an aurora devotee

Sometimes the aurora is a low, green arc sitting still on the horizon. Sometimes it visibly ripples across the sky, like moving pages of a book. Sometimes it pulses here, then there, then over there — like an ethereal game of whack-a-mole.

by Andrew Krueger