Hacker News on 23 April 2021

• Why Lichess will always be free
• The most effective malaria vaccine yet discovered
• Apple is sued for telling you that you're “buying” movies
• Get better at Googling
• Apple’s M1 Positioning Mocks the Entire x86 Business Model
• A new way to make maps with OpenStreetMap
• Beej’s Guide to C Programming [pdf]
• Light Pollution Map
• Cycles X
• Lego Microscope