Image of map of world with hotspots marked with red circles

Photo by Martin Sanchez on Unsplash

Microscopic image of thousands of bacteria

Chroococcidiopsis thermalis, an extremophile bacteria • Image by T. Darienko (CC BY-SA 4.0)

Image of a Martian meteorite

Martian meteorite ALH84001 • NASA/JSC (Public Domain)

Image of an orange tentacled fungus attached to a juniper tree

Cedar-apple rust • Amy Manjon (CC BY-SA 4.0)

Image of abandoned and overgrown house

Abandoned Bahamian house • Photo by Trish Hartmann (CC BY 2.0)

Image of a human hand holding a green plant leaf

Photo by Ravi Roshan on Unsplash

Image of three young siblings viewed from the back

Photo by Juliane Liebermann on Unsplash

Image of the lifeless surface of Mars

The lifeless surface of Mars • NASA/JPL/MSSS, processing by Olivier de Goursac (CC BY-SA 3.0)

Close-up image of a mosquito feeding on human blood

A mosquito of the genus Anopheles • Jim Gathany/CDC (Public Domain)

Microscopic image of Propionibacterium

Propionibacterium • Image by CDC/Bobby Strong (Public Domain)