The rocky planets – Mercury, Venus, Earth and Mars – were born of similar material around the same time, yet only one supports life. Were Earth’s neighbors always so extreme? Is there somewhere else in the solar system where life might flourish?

The Planets: Inner Worlds

The rocky planets – Mercury, Venus, Earth and Mars – were born of similar material around the same time, yet only one supports life. Were Earth’s neighbors always so extreme? Is there somewhere else in the solar system where life might flourish?

The Planets: Mars

Mars was once a blue water world studded with active volcanoes. But when its magnetic field and protective atmosphere faded, it became the frozen desert planet we know today. With so many necessary elements in place, did life ever form on Mars?

The Great Math Mystery

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 riddle: Is math an invention or a discovery?

The Great Math Mystery