Polar bears leave behind more than just footprints when they walk across the snow. They also leave behind their DNA. And now, for the first time, scientists can scoop up that DNA and use it to learn ...
(CBS) -- A very subtle sign of spring is seen in a west suburban snow print, reports WBBM's John Cody. Naturalist Margaret Gazdacka was leading some fourth graders on a snow shoe hike at Red Oak ...
Winter is an especially great time to go hunting for animal tracks in the snow. In summer, animals’ prints can be difficult to spot on packed dirt trails. But snow preserves them, allowing hikers to ...
Polar bears leave behind more than just footprints when they walk across the snow. They also leave behind their DNA. And now, for the first time, scientists can scoop up that DNA and use it to learn ...
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