Venus' surface is twice the temperature of a pizza oven; yet engineers push the boundaries of science to build probes that can deliver data from the depths of this crushing inferno; experts describe their battle strategies and technologies.
Astrophysicists at the forefront of the search consider the possibility of finding a planet like Earth among any of the bodies discovered by a new space-based telescope.
Witnessing Hurricane Ida's devastation as it reduces Louisiana to rubble; following a man running for his life from California wildfires; facing a deadly sea swirl with a Norwegian ship crew; looking for a snow kiter engulfed by an avalanche.
Rescuers aid a young girl trapped under rubble after a Turkish earthquake, all while a tsunami threatens to add to the turmoil; a father and daughter escape Oregon wildfires; a flash flood upstages an outdoor wedding.
Molten lava devours homes and lives when a volcano erupts on La Palma; an entire U.S. town submerged by endless downpours; colossal ice boulders in Italy.
An Ontario man flings into a tornado; a helicopter and jet ski rescue team go into an intense flood; an avalanche crashes a party; an adventurer survives being trapped upside down in a raging river in Papua New Guinea.
A group of experts studying the range and impact of megafires examine why these blazes are beyond control, what makes them insatiable and what is causing the crisis.
A team of experts introduces both ancient and newly discovered fire prevention techniques that can help confront the era of megafires to protect homes and families.
The Bahamas get pounded by 200mph winds during category five Hurricane Dorian - the most intense cyclone the country has ever seen; in Arizona, flash flooding sweeps a couple away resulting in a heart-stopping rescue.
Wildfires rip through Victoria, Australia. In Texas, a skydiving training session ends in disaster when there's a major midair collision at 30,000 feet.
In Arkansas, two storm chasers help warn people that a tornado is barrelling towards them, wreaking havoc on downtown Jonesboro and leaving a trail of destruction. In Idaho, a daredevil adventurer decides to swim beneath a frozen lake.
In Australia, the worst bushfires in recent history attack multiple towns - overwhelming firefighters and trapping tourists; The Philippines is usually resilient to natural disasters, but a 6.4 magnitude earthquake catches everyone off-guard.