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"It is the only piece of science I've ever done that's really emotionally got me," he says.

Жители Санкт-Петербурга устроили «крысогон»17:52

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Unless, as with Nava, we teach them.

这次最有意思的发现是：上过太空的这只鼠妈妈，居然比普通小鼠还能生。