“I know it sounds made up,” my friend said. “But there is something about turning 30 and your knees giving up on you – mine gave out almost straight away.” The rest of the group nodded in agreement but I felt a pang of jealousy. Mine have been on the out since I was 16. Knee problems seem so widespread I started to wonder why evolution hasn’t sorted things out by now.

The problem, biomechanics researcher Michale Berthaume writes, is that our knees evolved for a hunter-gatherer lifestyle and most people don’t build enough muscle to support them properly. That doesn’t mean we should write them off as an inferior joint though. Berthaume’s new study adds weight to the idea that our knees probably helped our ancestors walk on two legs more efficiently than our extinct relatives.

A new fentanyl vaccination is showing promise as a tool in the fight against the opioid epidemic. But some researchers are concerned that the vaccines will not address the root causes of addiction and point to a study showing a cocaine vaccination didn’t reduce the amount of cocaine participants took.

Plus, we hear from an expert in gothic culture on how the new Beetlejuice sequel gives a fascinating insight into how different generations interpret goth girls.

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