: A graphite and colored pencil work on paper by artist Uhma Janus.
: A graphite and collage piece on paper by Roberto Luis Sirvent Tolsa. : A graphite and colored pencil work on
: A classic scientific article by J. C. Carvalho published in the Revista do Instituto Adolfo Lutz in 1953, discussing predatory nematodes. featured on Saatchi Art .
: A pencil-on-paper artwork by Brazilian artist Maicon Douglas Silva Alves, featured on Saatchi Art . : A graphite and colored pencil work on