Ever wondered what your life would be like if things had gone differently? If you had pursued your passion? If you hadn't met that person? Or what if, in fact, things could not possibly have been any different? A psychologist from a parallel universe will look for answers by studying the alternate lives of one of her patients.

Science fiction has long anticipated the rise of machine intelligence, and today a new generation of self-learning computers has begun to reshape every aspect of our lives. Will A.I. usher in an age of unprecedented potential, or prove to be our final invention?

"The Principle" brings to light astonishing new scientific observations challenging the Copernican Principle; the foundational assumption underlying the modern scientific world view. The idea that the Earth occupies no special or favored position in the cosmos has launched the last two scientific revolutions - the Copernican Revolution and Relativity - and, as Lawrence Krauss has said, we could be on the verge of a third, with "Copernicus coming back to haunt us". Interviews with leading cosmologists are interspersed with the views of dissidents and mavericks, bringing into sharp focus the challenges and implications not only for cosmology, but for our cultural and religious view of reality.

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?

There’s something very odd going on in space – something that shouldn’t be possible. It is as though vast swathes of the universe are being hoovered up by a vast and unseen celestial vacuum cleaner. Sasha Kaslinsky, the scientist who discovered the phenomenon, is understandably nervous: ‘It left us quite unsettled and jittery’ he says, ‘because this is not something we planned to find’. The accidental discovery of what is ominously being called ‘dark flow’ not only has implications for the destinies of large numbers of galaxies – it also means that large numbers of scientists might have to find a new way of understanding the universe. Dark flow is the latest in a long line of phenomena that have threatened to re-write the textbooks. Does it herald a new era of understanding, or does it simply mean that everything we know about the universe is wrong? .

Chasing Utopia is a feature documentary asking the question everyone should be asking: will AI be humanity's greatest achievement or its greatest downfall? Mo Gawdat spent two years travelling the world - from Shanghai to Riyadh, New York to London - to find out, engaging with the leading minds shaping our future including Yoshua Bengio, Fei-Fei Li, Geoffrey Hinton, Max Tegmark, Elon Musk and Sam Altman. The result is a film that might change the way you see everything