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

Kim Taylor / Wood Ant (Formica rufa) worker protecting the nest by jetting formic acid from its tail. Endemic to Europe and Asia. Surrey, UK.

John Cancalosi / Pyrite (FeS2, iron sulfide), known as 'Fool's Gold'. Formerly used in the production of sulfuric acid. Sample from Concepcion de Oro, Zacatecas State, Mexico.

John Cancalosi / Apatite (Ca5(PO4)3F, fluorapatite), used in the production of phosphate fertilizers and the production of salts of phosphoric acid and phosporous, a common mineral. Sample from Slyudyanka, Baikal regi...

Chris Gomersall / 2020VISION / Volunteers from Essex and Suffolk Water helping to clear gorse from heathland at Minsmere RSPB reserve, Suffolk, UK, February 2011. 2020VISION Book Plate.

Chris Gomersall / 2020VISION / Volunteers from Essex and Suffolk Water helping to clear gorse from heathland at Minsmere RSPB reserve, Suffolk, UK, February 2011.

Chris Gomersall / 2020VISION / David Tipling, 2020VISION photographer, working at Wetleton Heath, Minsmere RSPB reserve, Suffolk, UK, February 2011. Model released

Chris Gomersall / 2020VISION / Forestry workers with "forwarder" machine, removing felled timber from Dunwich Forest, Suffolk, UK, February 2011. Non-native Corsican pine trees planted in 1990 are gradually being removed by the For...

Chris Gomersall / 2020VISION / RSPB reserves staff removing birch trees from heathland and chipping waste for recycling, at Minsmere nature reserve, Suffolk, UK. February 2011.

Chris Gomersall / 2020VISION / RSPB reserves staff scraping heath surface layer and litter at Dunwich Heath National Trust reserve, Suffolk, UK. This promotes a mosaic of new heather growth on the mature heath, while simultaneously...

Chris Gomersall / 2020VISION / RSPB reserves staff thinning woodland encroaching onto heath at Westleton Heath (Natural England), Suffolk, UK, February 2011.

Kim Taylor / Wood Ant (Formica rufa) workers on top of their nest synchronise ejection of formic acid droplets to maximise deterrent effect on potential predator, UK. Commended in the Audubon Society of Greater De...