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Links:

• Paul Graham on Twitter: "Americans have fewer friends than they used to. 15% of men and 10% of women have no close friends. https://t.co/Dl2lSknT18" / Twitter
• Harvard Health on Twitter: "Compared with people who didn't take a tub bath more than twice a week, people who took a daily warm or hot bath had a 28% lower risk of cardiovascular disease and a 26% lower risk of stroke: https://t.co/2fpXUOlB71 #HarvardHealth https://t.co/0Lcop1x6Bl" / Twitter
• Surfside condominium building collapse - Wikipedia — On June 24, 2021, at approximately 1:25 a.m. EDT, Champlain Towers South, a 12-story beachfront condominium with a penthouse and an underground garage in the Miami suburb of Surfside, Florida, United States, experienced a sudden partial collapse.
• The problem with reinforced concrete — By itself, concrete is a very durable construction material. The magnificent Pantheon in Rome, the world’s largest unreinforced concrete dome, is in excellent condition after nearly 1,900 years. And yet many concrete structures from last century – bridges, highways and buildings – are crumbling. Many concrete structures built this century will be obsolete before its end.