Things I learned lately 25 Feb

• Silicon Valley is so expensive, people who make $400,000 think they're the middle class. In reality, American middle class ranges from about $40,000 to $150,000 depending on where you live.
• Russian bots practised for influencing the 2016 US election with a Thanksgiving food poisoning hoax on Twitter.
• Kareem Abeed, Syrian producer of the Oscar-nominated documentary "Last Men in Aleppo," will not be able to attend the Academy Awards because his visa application was rejected. The documentary looks at a volunteer group called The White Helmets that rescues victims buried in rubble following bombings in Aleppo during the Syrian civil war.
• As many as 450 branches of KFC across the UK were shut for at least four days after a change of distributors led to a nationwide chicken shortage for KFC. Some are open with severely limited menus. A restaurant in Bristol could only offer BBQ beans, lettuce and popcorn chicken. Some would-be customers took to calling the police to complain.
• New research has shown a strong link between heavy drinking and developing early-onset dementia. Chronic heavy drinking is more than four drinks a day for a man, and more than three for a woman.