Encyclopedias, Almanacs, Transcripts, and Maps
- Barn Owls: Tytonidae
- Barnacles and Relatives: Thecostraca
- Barnaud, Nicholas (sixteenth century)
- Barnum Effect
- Baron Carl Auer von Welsbach
- Baron Dominique-Jean Larrey
- Baron Ferdinand Paul Wilhelm von Richthofen
- Baron Friedrich Heinrich Alexander von Humboldt
- Baron Nils Adolf Erik Nordenskiöld
- Baron Pierre-Paul Riquet de Bonrepos
- Barqu
- Barracudas, Tunas, Marlins, and Relatives: Scombroidei
- Barrett, Francis (fl. nineteenth century)
- Barrett, Sir William Fletcher (1844-1925)
- Barringer Meteor Crater
- Barry Clifford
- Barry J. Marshall
- Bart Jan Bok
- Bartel Leendert van der Waerden
- Bartholomeo Pitiscus