Image of portable radio

Photo by Rayan Almuslem on Unsplash

Artist's impression of asteroid impact

Artist's impression of asteroid impact • Donald E. Davis (Public Domain)

Image of sleeping woman

Photo by Ivan Oboleninov from Pexels

Image of whale's tail above water

Photo by Derek Oyen on Unsplash

Welcome propaganda

Some weeks ago I swam with a wild dol­phin. Well, not quite wild. This par­tic­u­lar dol­phin has tak­en up res­i­dence in the cold waters of Din­gle Har­bor in south­west Ire­land and seems pleased to swim with what­ev­er per­son comes his way. A lot of peo­ple have availed them­selves of the oppor­tu­ni­ty, so many that the Din­gle dol­phin has become an impor­tant tourist attraction.

Image of fruit fly

A fruit fly • Photo by Hannah Davis (CC BY-SA 4.0)

Image of Valles Marineris

Valles Marineris on Mars • Image by Kevin Gill (CC BY-SA 2.0)

Image of large periodic table

Period table of elements, Houston Museum • Photo by Shadow Byrd (CC BY-SA 2.0)

Artist's impression of spacecraft entering a wormhole

Artist's impression of space travel via wormhole • Les Bossinas (Public Domain)

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)