Irina Zhorov
Stories
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Environment
A Christmas Tree Thrives On Farms, Struggles In The Wild
The Fraser fir is found in a lot of homes around Christmas. But its wild cousins have been in decline for almost a century because of a small invasive pest.
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Science
How A Bird Became Flightless Through Evolution — Twice
More than 100,000 years ago, a bird flew from Madagascar to an island chain, where it lost the ability to fly. The seas rose and then fell and the bird flew back, only to become flightless again.