One hundred years ago, colorful canaries warned humans of the hidden hazards of digging for coal by riding shotgun down the mine and dropping dead.
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One hundred years ago, colorful canaries warned humans of the hidden hazards of digging for coal by riding shotgun down the mine and dropping dead.
Antarctic sea ice has reached record low levels for the second time in two years, with some scientists alarmed that dramatic drops are a signal the climate crisis may now be more clearly influencing this vast, complex and isolated region.