Image of a pile of discarded food and drink containers

Photo by Jasmin Sessler on Unsplash

Image of brown butterfly perched on leaf

The Goggle Eye, or Cercyonis pegala • Photo by D. Gordon E. Robertson (CC BY-SA 3.0)

Abstract space image

Image by Gerd Altmann from Pixabay

Image of the digital edition of Wired magazine displayed on an iPad next to a print edition of the magazine

Photo by Richard Giles (CC BY-SA 2.0)

Image of a hummingbird drinking nectar from a cardinal flower

A hummingbird helps to pollinate a cardinal flower • Photo by Joshua J. Cotten on Unsplash

Image of airplane spraying DDT over forest

DDT being sprayed over an Oregon forest in 1955 • USDA Forest Service (Public Domain)

Image of dramatic clouds over mountains in Ireland

Photo by Olivier Guillard on Unsplash

Image of teacher standing in front of classroom full of children

Photo by NeONBRAND on Unsplash

Nighttime view of the stars over the ocean

Photo by Casey Horner on Unsplash

Painting of old man ogling a young woman

Detail from “The Old Man in Love” by Lucas Cranach the Elder (ca. 1530)