From the 500 least popular lectures out of the more than 1,600 available on the website of TED, a nonprofit organization that aims to “bring together the world’s most fascinating thinkers and doers, who are challenged to give the talk of their lives (in 18 minutes or less).”

Crowd-source your health
Beethoven the businessman
Saving for tomorrow, tomorrow
Is life really that complex?
The hidden world of box-packing
My subversive (garden) plot
Hurdy-gurdy for beginners
Cheese, dogs, and a pill to kill mosquitoes and end malaria
The early birdwatchers
The cockroach beatbox
Can we domesticate germs?
Eco-friendly drywall
Blindfold origami and cello
A manifesto for play, for Bulgaria and beyond
“The Dog Song”
Take “the Other” out to lunch
Extreme swimming with the world’s most dangerous jellyfish
Rethinking the way we sit down
Learn to use the thirteenth-century astrolabe
A simple solution to the coming phosphorus crisis
Playtime with Pleo, your robotic dinosaur friend