To eliminate waste, we need to rediscover thrift | Andrew Dent

The human stories behind mass incarceration | Eve Abrams

How quantum physics can make encryption stronger | Vikram Sharma

The role of faith and belief in modern Africa | Ndidi Nwuneli

Why I choose humanism over faith | Leo Igwe

How we can teach computers to make sense of our emotions | Raphael Arar

Should we create a solar shade to cool the earth? | Danny Hillis

How I use the drum to tell my story | Kasiva Mutua

The Standing Rock resistance and our fight for indigenous rights | Tara Houska

How a team of chefs fed Puerto Rico after Hurricane Maria | José Andrés