Animals & Nature
How Arizona’s ancient trees became quartz
Burial, mineral-rich water and time preserved ancient wood in stone. The colorful logs also carry signs of the stresses that later broke them apart.
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Burial, mineral-rich water and time preserved ancient wood in stone. The colorful logs also carry signs of the stresses that later broke them apart.
Crater Lake’s Old Man is a drifting hemlock log with a long observation record and a balancing act that still invites explanation.
Powerful muscles, layered insulation and warmer feeding grounds help bison endure Yellowstone winters. Finding enough food still takes energy, even for an animal built for the cold.
Archival expedition photographs reveal octopuses in places people rarely get to see.