Detail from comic strip image depicting Ignatz Mouse throwing a brick at Krazy Kat

George Herriman's "Krazy Kat"

Image of man in dirty overalls next to pile of graphite bricks

The world's first nuclear reactor was within a pile of graphite bricks • (Public Domain)

Chicago, December 1942

Physi­cist Albert Wat­ten­berg was pok­ing about in the Chica­go branch of the Nation­al Archives recent­ly. He was look­ing for arti­facts used by Enri­co Fer­mi and his team of nuclear physi­cists in achiev­ing the first self-sus­tain­ing nuclear reac­tion in a squash court under the Uni­ver­si­ty of Chicago’s foot­ball sta­di­um in Decem­ber 1942.

Telescopic image of nebula surrounding pulsar

The nebula surrounding the Crab Pulsar • Optical: NASA/HST/ASU/J. Hester et al. X-Ray: NASA/CXC/ASU/J. Hester et al.

Computer visualization of a high-energy particle collision

Computer visualization of a high-energy particle collision • McCauley, Thomas; Taylor, Lucas; for the CMS Collaboration (CC BY-SA 3.0)

Image of large particle accelerator

ATLAS experiment at CERN • CERN (CC BY 4.0)

Image of street sign on Wall Street in New York

Photo by Uwe Conrad on Unsplash

Image of nuclear fireball

The Trinity test at the moment of detonation

Image of a collection of clocks

Photo by Lucian Alexe on Unsplash

Sequence of images recording a green flash at sunset

A green flash at sunset • Images by Brocken Inaglory (CC BY-SA 3.0)

Close up image of beer bubbles in glass

Photo by Timothy Dykes on Unsplash