"The goal of me as a cancer doctor is not to understand cancer ... the goal is to control cancer," says Dr. David Agus. Courtesy of TED hide caption

itoggle caption Courtesy of TED

Dr. Jay Bradner believes open-source research is necessary in the fight against cancer. Courtesy of Bradner Lab hide caption

itoggle caption Courtesy of Bradner Lab

Healthy diets help prevent, even reverse, some health conditions. Dr. Dean Ornish believes it can also do the same for cancer. Courtesy of TED hide caption

itoggle caption Courtesy of TED
Hanna Barczyk for NPR

A nanosecond pulsed laser beam starts the photoacoustic imaging process. Geoff Story/Courtesy of Washington University in St. Louis hide caption

itoggle caption Geoff Story/Courtesy of Washington University in St. Louis

For 3-D food printers, chocolate is a good material to start with, because it's fairly simple to make it liquid inside the printer cartridge and solid once it drops out. Courtesy of Smart Gastronomy Lab, University of Liège hide caption

itoggle caption Courtesy of Smart Gastronomy Lab, University of Liège

"What has happened in the last ten years, has been a remarkable increase in actual number of people who are dying or are not able to get better because they carry a resistant infection."--Ramanan Laxminarayan Courtesy of TEDMED hide caption

itoggle caption Courtesy of TEDMED

"We've under-priced water, we've over-exploited it, we don't regulate how people pump groundwater out of the ground.... we just use too much."--Jonathan Foley Courtesy of TEDxTC hide caption

itoggle caption Courtesy of TEDxTC

"There's a saying in Suriname that I dearly love: 'The rainforests hold answers to questions we have yet to ask.' But as you all know, it's rapidly disappearing."--Mark Plotkin Ryan Lash/TED hide caption

itoggle caption Ryan Lash/TED

"Shout, shout, let it all out. These are the things I can do without." Simone Golob/Corbis hide caption

itoggle caption Simone Golob/Corbis
Leigh Wells/Ikon Images/Getty Images

A cabbage butterfly caterpillar. For tens of millions of years, these critters have been in an evolutionary arms race with plants they munch on. The end result: "mustard oil bombs" that also explode with flavor when we humans harness them to make condiments. Courtesy of Roger Meissen/Bond LSC hide caption

itoggle caption Courtesy of Roger Meissen/Bond LSC

Horses, riders and runners crossed three streams in the course of their 22-mile race through the hills of central Wales. The average finish time was the same for both species — four hours. Ryan Kellman and Adam Cole/NPR's Skunk Bear hide caption

itoggle caption Ryan Kellman and Adam Cole/NPR's Skunk Bear

Cesar Kuriyama explains his app 1 Second Everyday at TED. James Duncan Davidson/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/Courtesy of TED

Psychologist Laura Carstensen explains why growing older also means growing happier for so many people. Michael Priest Photography/Courtesy of TED hide caption

itoggle caption Michael Priest Photography/Courtesy of TED

Theoretical Physicist Sean Carroll asks why does time exist? Marla Aufmuth/Courtesy of TED hide caption

itoggle caption Marla Aufmuth/Courtesy of TED

"Human beings are works in progress that mistakenly think they're finished," says psychologist Dan Gilbert. Ryan Lash/Courtesy of TED hide caption

itoggle caption Ryan Lash/Courtesy of TED

Joy (left, voiced by Amy Poehler) and Sadness (voiced by Phyllis Smith) catch a ride on the Train of Thought in Pixar's Inside Out. The movie opens in theaters nationwide June 19. Disney/Pixar hide caption

itoggle caption Disney/Pixar

TED Prize winner Dave Isay speaks at TED2015. Bret Hartman/Courtesy of TED hide caption

itoggle caption Bret Hartman/Courtesy of TED