Image of fossilized sea animal

Fossilized crinoid in chalk • Photo by James St. John (CC BY 2.0)

Chalk talk

In the sum­mer of 1868, the British Asso­ci­a­tion for the Advance­ment of Sci­ence held its annu­al meet­ing in the town of Nor­wich, 90 miles north­east of Lon­don. At that meet­ing, Thomas Hen­ry Hux­ley, one of the great­est nat­ur­al his­to­ri­ans of his day and a cham­pi­on of Dar­win’s new the­o­ry of evo­lu­tion, deliv­ered a talk enti­tled “On a Piece of Chalk.” His audi­ence was the ordi­nary work­ing­men of the town.

Image of strawberry begonia

Strawberry begonia, neither a strawberry nor a begonia • Photo by Alpsdake (CC BY-SA 4.0)

Image of sage grouse at lek

Greater sage grouse lekking • Jeannie Stafford/USFS (Public Domain)

Image of shrimp

Denizens of an EcoSphere • Photo by David Goehring (CC BY 2.0)

A world under glass

I have on my desk a clear glass sphere about three inch­es in diam­e­ter, on a plas­tic stand. The sphere is two-thirds filled with water. The remain­ing vol­ume con­tains air. A snip of green algae, sea grass, floats in the water, and four tiny pink shrimp swim lazi­ly about. The sphere is com­plete­ly sealed. With the excep­tion of heat and light, there are no trans­ac­tions with the out­side environment.

Image of Garden in the Woods

The Garden in the Woods, Framingham MA • Photo by Daderot (Public Domain)

Image of magazine covers

Scientific American through the years

Image of Jacques-Louis David painting

Detail from “The Intervention of the Sabine Women” by Jacques-Louis David, 1799

Image of astrology charts

Definitely not science (Public Domain)

Illustration of the Brooklyn Bridge in 1883

Chromolithograph of the “Great East River Suspension Bridge,” 1883 • Currier and Ives (Public Domain)

Image of Canada mayflower

Canada mayflower • Photo by Woods People (CC BY 2.0)