Mission Unstoppable - Season 4

A biogeochemist shows how oysters help clean oceans; a video game producer explains the math behind games; a NASA electrical engineer assembles a battery out of lemons; a chemistry teacher cooks up biodiesel in her lab.

An ecologist studies adorable pikas; the hidden data on cellphones; a nuclear engineer refines rare isotopes that power NASA's Perseverance Mars rover; the incredible story of the first computer programmer.

A cosmetic chemist shares the science of lipstick; a wildlife biologist studies the animals of Alaska's wetlands; a geologist reveals the properties of common minerals; an aerospace engineer demonstrates how turbines harness the power of wind.

An astrobiologist looks for clues about Martian life at Utah's Great Salt Lake; how different experts work together to build skyscrapers; large-scale industrial 3D printing; a fun experiment one can try at home.

An ecologist's virtual reality technology helps study and save coral reefs; a cosmetic chemist creates moisturizer in her lab; an environmental scientist uses cutting-edge technology to fight smog; Dr. Brain explains the feeling of deja vu.

How explosions help mine limestone; how doctors keep professional singing voices healthy; why water is so bad for electronics; some incredible shark facts.

A physical therapy doctor demonstrates the technology she uses to help top athletes; a farmer shows how composting grows healthy fruits and vegetables while helping the environment; two citizen scientists work to keep river water safe.

A fashion designer shows how they create vegan leather; why one can't imagine a new color; the power of a Tesla coil; a virtual world that can be felt with one's fingertips.

A perfume chemist explains the science behind one's favourite scents; how the brain controls tears; a team in Texas is restoring a prairie -- and creating space for birds; an electrical engineer is the first Mexican woman in space.

A physicist who's also a ballerina builds robots that dance; physicist Marie Curie; a chef shows the science behind baking substitutions; an aquarist cares for little blue penguins.

A physical therapy doctor helps top athletes; a vocal coach shows how doctors keep professional singing voices healthy; an environmental scientist fights smog; an electrical engineer uses magnets to create a tiny, functioning train.

Saving trees in Hawaii from an invasive beetle species; how humans actually taste things; restoring the pronghorn population in West Texas; the science that makes race cars so fast.

Supertasters; making edible worms from algae; a teacher codes self-driving cars; the science that helps train medical service dogs.

How explosions help mine limestone; a meat alternative made from fungi; physicist Marie Curie; why people are drawn to phones.

An electrical engineer is the first Mexican woman in space; a farmer shows how composting grows healthy fruits and vegetables while helping the environment; mind-blowing discoveries of NASA's latest space telescope.

A geographer uses satellites to track wildfires and drought conditions; a look at what brain freeze does to the brain; a conservationist working hard to save sea dragons; a landscaper learns about new technologies that can help her business.

A teacher helps students create a robotic garden; what's really on sandy beaches; chef Claire shows how to make a "quickle" with kitchen chemistry; a chemical engineer shows how NASA deals with trash in space.

A researcher studies the senses of cephalopods; an entrepreneur creates hair care with chemistry; Dr. Brain reveals why one's brain might be tickled by ASMR.

A CEO who believes in expanding representation through computer coding; why an elephant never forgets; the science behind tie-dye; a wildlife rehabilitator cares for birds in Hawaii.

A day in the life of an aquarist who cares for little blue penguins; discussing how one can't imagine a new colour; an entomologist on a mission to save trees in Hawaii from an invasive beetle species; a teacher codes self-driving cars.

Supertasters; the science behind tie-dye; robots that dance; researchers and conservationists in West Texas use helicopters to restore the pronghorn population.

Citizen scientists help protect timber from poachers by sampling tree DNA; an animator uses tech to make movies; a young coder meets a software engineer and learns about patents; a scientist helps astronauts grow vegetables in space.

A grassland ecologist shows what grass is doing underground; lighting up a lab with a little chemiluminescence; an app to push consumers toward products with sustainable palm oil.

A CEO supports a team of explorers and innovators at National Geographic; what happens in one's brain when one feels shame; a storm chaser sends up a weather balloon to show how storms form; a volcanologist in Hawaii.

A perfume chemist shows the science behind scents; sharks; caring for birds in Hawaii; making edible worms from algae.