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At least half of all mammal species are burrowers. https://t.co/omqUepGQpS
At least half of all mammal species are burrowers. https://t.co/omqUepGQpS
@Christ21cent And trace fossils (burrows & other traces from ancient seabeds) http://t.co/uQr0UyrENU @mhuypens @c_science4kids @Ah_Science