Disc.Science The Yeti Strikes Back. The Yeti, a machine with 588 sharp teeth, helps keep the coldest airport in America running. Plus, mighty tugboats chew through ice chunks in Alaska. S1, Ep3 2026-08-21 Empire State Building: The New Secrets. Experts use cutting-edge technology to investigate one of the wonders of the modern world. They reveal mysteries hidden in its foundation. S4, Ep9 2026-08-21 Egypt's Buried City. Experts use cutting-edge technology to investigate a lost city buried in the Sahara. Archaeologists are uncovering the city's forgotten ruins and dark secrets. S4, Ep10 2026-08-21 Mystery Of Planet 9. Scientists have discovered evidence of a mysterious ninth planet on the very edge of our solar system, could its moons support extra-terrestrial life? S5, Ep1 2026-08-21 The Universe's Deadliest. The Universe is a violent and dangerous place. From exploding stars and colliding galaxies to nebula shockwaves - what are the worst places in the Universe? S5, Ep2 2026-08-21 Black Holes: The Secret Origin. Supermassive black holes are so large they devour stars and shape galaxies. The latest science may answer why they grow so large. S5, Ep3 2026-08-22