Palaeontology: Gritting their teeth.
Bernard
B
Wood
D000818:Animals; D003743:Dental Enamel / Q000378:metabolism*; D004391:Dust / Q000032:analysis; D005580:Fossils; D006244:Hardness; D015186:Hominidae; D006801:Humans; D008963:Molar; D010944:Plants / Q000737:chemistry; D057079:Pongo; D011791:Quartz; D012822:Silicon Dioxide / Q000737:chemistry; D014072:Tooth Abrasion / Q000378:metabolism*
D004391:Dust; D011791:Quartz; D012822:Silicon Dioxide