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See also: A class action lawsuit claims Amazon is refusing to provide customers with tariff refunds to “curry favor with Trump by allowing the federal government to retain the funds.” / Engadget

Stressing this isn’t a “pandemic emergency,” the World Health Organization declares the Ebola outbreak in Congo and Uganda an international health emergency. / NPR

Unrelated: A new app makes it possible to hack electronic shelf labels. / Gizmodo

Scientists recently discovered a new material—a calcium, copper, and silicon clathrate—that formed during the world’s first nuclear test in July 1945. / WIRED

“We need to come up with a new social contract around these tools.” Trevor Paglen and Holly Herndon on art and AI. / Totei

Researchers say they’ve invented a serum that can revive mammals’ dormant ability to regrow limbs. / Futurism

“A Japanese manufacturer of animatronic wolves designed to scare off wild animals is being swamped with orders as the East Asian country grapples with rising bear attacks.” / The Independent

You won’t want to miss the feeding times at the Denali sled dog puppy cam. / National Park Service

Biologists have observed whales “yelling” to be heard over shipping noise in the Strait of Gibraltar. / Discover

“How about a 1.0, 2.0, type A, A to B, B to C, or a micro to macro?” I cannot throw away USB cables, and it is becoming a problem. / McSweeney’s

Before Linotype, human compositors were renowned for their typesetting speed, and competed in public races that drew thousands of spectators. / Public Domain Review