25 分钟on MSN
Researchers from Polar Bears International, San Diego Zoo Wildlife Alliance, the Norwegian Polar Institute, and the ...
Mother bear with three cubs. Recorded using a remote camera as part of the maternal den research in Svalbard, Norway with Polar Bears International, the Norwegian Polar Institute, and the San Diego ...
10 分钟
来自MSNA quirky evolutionary historyBy Kent DunlapI broke its neck. When making a vase at the potter’s wheel, I torqued its slippery neck clear off the pot as I tried to thin it into a graceful curve.I find vases gratifying to make and ...
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