While a close relationship between these and ungulates was already proposed by Frank Evers Beddard in 1900, and is generally accepted today, cetaceans have diverged so radically from their ancestors' lifestyle as to confound analyses of fossils and perhaps even DNA.
Frank Sinatra | Frank Zappa | Frank Lloyd Wright | Frank Capra | Frank Gehry | L. Frank Baum | Frank Stella | Frank | Frank Herbert | Frank Wedekind | Anne Frank | Frank Loesser | Frank Langella | Frank Whittle | Frank Keating | Frank Lautenberg | Frank McCourt | Frank Vincent | Frank Evershed | Frank Bruno | Frank Thomas | Frank Rich | Frank Ocean | Frank Morgan | Frank Lampard | Frank Gifford | Barney Frank | Waldo Frank | Frank Urso | Frank Paschek |