<a href="https://en.wikipedia.org/wiki/List_of_spacecraft_called_Sputnik" id="mwARg" rel="mw:WikiLink" title="List of spacecraft called Sputnik">Sputnik program</a>: <i id="mwARk"><a href="https://en.wikipedia.org/wiki/Korabl-Sputnik_2" id="mwARo" rel="mw:WikiLink" title="Korabl-Sputnik 2">Korabl-Sputnik 2</a></i>: The Soviet Union launches the satellite with the <a href="https://en.wikipedia.org/wiki/Dog" id="mwARs" rel="mw:WikiLink" title="Dog">dogs</a> <a href="https://en.wikipedia.org/wiki/Soviet_space_dogs#Belka_and_Strelka" id="mwARw" rel="mw:WikiLink" title="Soviet space dogs">Belka and Strelka</a>, 40 mice, two rats and a variety of plants.