Africa
Business
The Low-Paid Humans Behind AI’s Smarts Ask Biden to Free Them From ‘Modern Day Slavery’
By Caroline Haskins
Science
Countries Are Building Giant ‘Sand Motors’ to Protect Their Coasts From Erosion
By Jake Bittle
Science
High Blood Pressure Is the World’s Biggest Killer. Now There’s a Plan to Tackle It
By Maryn McKenna
Business
A Peter Thiel-Backed Startup City Wants to Be Africa’s Delaware
By Laurie Clarke and Nelson C.J.