Hacker News on 9 September 2021

• Tell HN: Thanks to thehodge and littlewarden.com, this site is up today
• Hong Kong: Police Raid Tiananmen Square Museum
• Paid influencers must label some posts as ads, German court rules
• California aims to ban recycling symbols on things that aren’t recyclable
• 60x speed-up of Linux “perf”
• A single laser fired through a keyhole can expose everything inside a room
• mRNA cancer therapy now in human trials after shrinking mouse tumours
• New math book rescues landmark topology proof
• OWASP Top 10 2021
• New details on silicon, subatomic particles and possible ‘fifth force’