Konrad Wothe / Slow motion clip of Wood ants (Formica rufa) on anthill, squirting formic acid to repel threat, Bavaria, Germany, April.

Doug Gimesy / Scientist examining river water to tests for platypus DNA. Cesar Research Laboratory, Melbourne, Victoria, Australia. June, 2017.Model released.

Michel Roggo / Waterlilies growing on a natural dystrophic lake, with water rich in humic acids, Danube Delta Biosphere Reserve, Danube Delta, Romania, May 2015 . Photographed for The Freshwater Project

Kim Taylor / Wood ants (Formica rufa) jetting formic acid to protect their nest. Surrey, England, June. Digital Composite.

Kim Taylor / Wood ants (Formica rufa) jetting formic acid at a human hand, Surrey, England, June.

Kim Taylor / Wood ants (Formica rufa) jetting formic acid at a human hand, Surrey, England, June.

SCOTLAND: The Big Picture / Veterinarian from The Royal Zoological Society Scotland / RZSS with blood sample from Scottish wildcat (Felis silvestris grampia). To be used for genetic testing. Inside RZSS mobile vet unit, Strathsp...

Paul D Stewart / Small leopard butterflies (Phalanta alcippe) puddling on sweaty trainers to gain valuable salts and amino acids, Thailand.

Kim Taylor / Wood ants (Formica rufa) jetting formic acid to protect their nest. Surrey, England, June. Digital Composite.

Ann & Steve Toon / Laurence Simmen (conservator for natural history, left) and Richard Sutcliffe (research manager, natural sciences) at Glasgow Museums Resource Centre, collecting black rhino horn sample for DNA analys...

Ann & Steve Toon / Laurence Simmen (conservator for natural history, left) and Richard Sutcliffe (research manager, natural sciences) at Glasgow Museums Resource Centre, using a drill to collect black rhinoceros (Dicero...

Ann & Steve Toon / Laurence Simmen (conservator for natural history, left) and Richard Sutcliffe (research manager, natural sciences) at Glasgow Museums Resource Centre, using a drill to collect black rhinoceros (Dicero...