Answer:
ok fossil record rabbit.. this fossil was record in the K-T boundary.
and The K–T boundary is a geological signature, usually a thin band, dated to (65.5 ± 0.3) Ma. K is the traditional abbreviation for the Cretaceous period, and T is the abbreviation for the Tertiary period. The boundary marks the end of the Mesozoic era and the beginning of the Cenozoic era, and is associated with the Cretaceous–Tertiary extinction event, a mass extinction.
oh and Rabbits belong to the order of mammals called Lagomorpha, which includes 40 or so species of rabbits..the also evolved to adapt to their own environment.
eh-hope this helps..