Jellyfish galaxies get their name from long trails of new stars streaming behind them, like tentacles. As a galaxy falls into a galaxy cluster, it plows through the thin, superheated gas that fills the space between galaxies, a process called ram pressure. That pressure strips gas out of the galaxy's disc and drags it backwards into long tendrils, where stars then form. JO206, more than 700 million light-years away in Aquarius, shows this clearly, with a bright star-forming disc trailing luminous streams. Surprisingly, stars in the tendrils form in much the same way as stars in the disc, suggesting the new environment matters less than expected.

In 1909 D. W. Griffith made a 14-minute film about a speculator who corners the wheat market and doubles the price of bread. A farmer sows his field while a 'Wheat King' gambles in the Chicago wheat pit; bakers raise the loaf from five cents to ten and the poor line up for bread. Griffith cut back and forth between the farm, the feast and the breadline, a technique called parallel editing, so audiences saw both ends of the economy at once. The film drew on Frank Norris's stories and on a real scheme: months earlier Chicago financier James Patten had cornered wheat, sent bread prices up and made about $5 million, roughly $185 million today.