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Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.

Luxury developer Michael Shvo and Core Club are trading lawsuits over ongoing disputes over leases at Shvo’s trophy towers.

Core exercises are hard work; you don’t have to hold a plank long before the burn starts to creep through your body. Plus, Mr. Hernandez pointed out, they can be boring.