Science

Cosmos

astronomy

Periscope

optical instrument

Cheetah

Speed, Habitat, Diet, Cubs, & Facts

Newfoundland

Dog, Temperament, & Facts

Sulfonation

chemical reaction

Phylogenetics

Slug

Families, & Facts

Talc

Uses, & Facts

Tuff

geology

Felsic Rock

igneous rock

Resin

chemical compound

Gonadotropin

hormone

Tenorite

mineral

Frugivore

animal

Whitlow Grass

plant genus

Courtois, Bernard

French chemist