When the Taliban seized power in 2021, Mersal Nabizada did not flee. It had been three days since Tyree Nichols, a 29-year-old black man, died in Tennessee. Pavlov's dog starts salivating when he hears a bell because he's learned that food follows the ringing. Why? Myse, buzzers and a bit of sugar will explain.
The response to the death of the 29-year-old has differed from that of previous cases of police killings; we ask what the tragedy indicates about how America deals with police violence. Our correspondent says a lawmaker’s murder in Afghanistan highlights the misery of women under the Taliban. And why a decades-old model of animal and human learning is under fire.
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