Russia just sent a mini menagerie to orbit.

The Bion-M No. 2 biosatellite launched atop a Soyuz rocket from the Russia-run Baikonur Cosmodrome in Kazakhstan today (Aug. 20), rising off the pad at 1:13 p.m. EDT (1713 GMT; 10:13 p.m. local time in Kazakhstan).

Onboard are 75 mice and 1,000 fruit flies, along with a variety of microbes, cell cultures and plant seeds. These living payloads will spend a month circling Earth, to help scientists gauge the effects of spaceflight on organisms and their various systems.

As its name suggests, the newly launched mission is the second in Russia's Bion-M line of space-medicine investigations, the successor to the nation's previous Bion program. (The last of the original Bion missions, Bion 11, flew in 1996.)

Bion-M No. 1 launched in April 2013, send

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