From left: Elon Musk, a sloth, Tom Cruise.
From left: Elon Musk, a sloth, Tom Cruise. (Jon Kopaloff/Getty Images for Breakthrough Prize; Ezequiel Becerra/AFP via Getty Images; Jamie Squire/Getty Images)

After the blissful news avalanches of campaign hijinks and the Olympics, we’re back to the usual soup of science, retail and animals. Plus, the latest from the ever-reliable quiz subject RFK Jr.

Need more quiz? Take Short Wave‘s Space Camp final exam.

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