Editor
The Taliban take over Afghanistan, and the threat of ISIS and Al Qaeda intensifies. On the ground, reporter Najibullah Quraishi (Leaving Afghanistan, Taliban Country) investigates uncertainty and fear among the Afghan people and revisits the lead-up to the U.S. defeat and the Taliban’s return.
Editor
Researchers seek solutions to contain the rising acidity levels that are threatening the world's oceans.
Editor
NOVA leads viewers on a mathematical mystery tour -- a provocative exploration of math's astonishing power across the centuries. We discover math's signature in the swirl of a nautilus shell, the whirlpool of a galaxy and the spiral in the center of a sunflower. Math was essential to everything from the first wireless radio transmissions to the prediction and discovery of the Higgs boson and the successful landing of rovers on Mars. But where does math get its power? Astrophysicist and writer Mario Livio, along with a colorful cast of mathematicians, physicists and engineers, follows math from Pythagoras to Einstein and beyond, all leading to the ultimate riddle: Is math an invention or a discovery? Humankind's clever trick or the language of the universe?
Director
After a narrow win hands Tuba City High School their 19th state championship, second place finisher Chinle sets out to topple their rivals and finally claim victory for themselves.
