NOVA | February 2022

Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive craters. In Alaska, a vast lake erupts with bubbles of flammable gas. Scientists are discovering that these mysterious phenomena add up to a ticking time bomb, as long-frozen permafrost melts and releases vast amounts of methane, a potent greenhouse gas. What are the implications of these dramatic developments in the Arctic? Scientists and local communities are struggling to grasp the scale of the methane threat and what it means for our climate future.
Airdates:
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate
Join biologists on an ingenious hunt for the clues hidden in animal poop.
Scott Burnett is Scatman, an Australian ecologist on the trail of the secrets of poop. By identifying and analyzing animal scat for DNA and hormones, he discovers essential details of their behavior, how they fit in the ecosystem and how to protect them. From the mysterious cubic poop of wombats to the precious pink waste of whales, join scientists as they explore nature's smelliest secrets.
Airdates:
Sir David Attenborough drops in for tea at the modest suburban home of Neville and Sally Hollingworth, both fossil collectors in southwest England. Neville and Sally spotted fossils lying in a nearby gravel quarry a decade ago, which led a team of paleontologists and archaeologists to undertake a major excavation. They discovered that the site preserved exceptional traces of the extinct beasts that populated Britain over 200,000 years ago and even more precious evidence of its early human inhabitants, including impressive stone tools, known as hand-axes, made by Neanderthals.
Airdates:
NOVA follows the dramatic personal journey of Hugh Herr, an MIT biophysicist who creates brain-controlled robotic limbs. At age 17, Herr's legs were amputated due to frostbite after he and a friend got lost in a snowstorm and nearly died while climbing New Hampshire's Mount Washington. Herr set out to remedy their design, frustrated by the primitive prosthetic legs he was given. While still a teenager, he crafted outsize prosthetic limbs that made him an even more accomplished climber than before the accident. Then, after training as an engineer, Herr devoted himself to creating advanced limbs that use electronics to mimic the body's own muscular and nervous control systems.
Airdates: