Big beauty in tiny things: Dr. Gary Greenberg

Dr. Gary Greenberg shares photographs of the micro-world — from the psychedelic landscapes hidden in flowers to the thousands of gems in a pile of sand. (Filmed at TEDxMaui.)

Each week, we choose four of our favorite talks, highlighting just a few of the enlightening speakers from the TEDx community, and its diverse constellation of ideas worth spreading. Browse all TEDxTalks here »

How to control the brain: Kelly Foote and Michael Okun

Neurologist Kelly Foote and neurosurgeon Michael Okun research direct brain stimulation — strategically implanting electrodes inside the skulls of their patients to alleviate symptoms of tremor, multiple sclerosis and even OCD. The technology could also potentially control emotions. Together, they propose a guiding ethical principle for the technology. (Filmed at TEDxUF.)

Each week, we choose four of our favorite talks, highlighting just a few of the enlightening speakers from the TEDx community, and its diverse constellation of ideas worth spreading. Browse all TEDxTalks here »

When philanthropy goes wrong: Martha Muña

When, in the late 1980s, it became fashionable for foreign charities to fund orphanages in Ghana, an epidemic of orphanages opened in the country over the next two decades. Pressured to stay open, they began taking in children who would previously be cared for by members of an extended family. Martha Muña sheds light on this complex issue and what she’s doing to repurpose these institutions and reunite children with families.(Filmed at TEDxStanford.)

Each week, we choose four of our favorite talks, highlighting just a few of the enlightening speakers from the TEDx community, and its diverse constellation of ideas worth spreading. Browse all TEDxTalks here »

Eat less meat, more bugs: Florence Dunkel

Insects are high in protein and — if prepared well — delicious. And according to Florence Dunkel, their low-cost, ecological production means we need to incorporate them into our diets if we want a stable future for food security.(Filmed at TEDxBozeman.)

Each week, we choose four of our favorite talks, highlighting just a few of the enlightening speakers from the TEDx community, and its diverse constellation of ideas worth spreading. Browse all TEDxTalks here »