Etruscan shrew
... that the Etruscan shrew is the smallest known mammal by weight?
... that the <b id="mwBh0"><a href="./Etruscan_shrew" id="mwBh4" rel="mw:WikiLink" title="Etruscan shrew">Etruscan shrew</a></b> <i id="mwBh8">(pictured on a human thumb)</i> is the smallest known <a href="./Mammal" id="mwBiA" rel="mw:WikiLink" title="Mammal">mammal</a> by weight?