Moon for Sale (Horizon - BBC)

After 40 years, man is preparing to return to the Moon. But this time the astronauts won't just land on the Moon - they plan to stay.
From his office in Nevada, Dennis Hope has spawned a multi-million dollar business selling lunar real estate. But scientists believe the real prize is trapped in the Moon's rocks. It contains large deposits of an extremely rare gas called Helium-3. Could Helium-3 be mined and used as a new source of almost inexhaustible, clean and pollution-free energy on Earth? Whoever succeeds in transporting Helium-3 back to Earth could solve the world's energy crisis.

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The Elegant Universe (NOVA - PBS)

One of the most ambitious and exciting theories ever proposed—one that may be the long-sought "theory of everything," which eluded even Einstein—gets a masterful, lavishly computer-animated explanation from bestselling author-physicist Brian Greene. Also known as superstring theory, the startling idea proposes that the fundamental ingredients of nature are inconceivably tiny strings of energy, whose different modes of vibration underlie everything that happens in the universe. The theory successfully unites the laws of the large—general relativity—and the laws of the small—quantum mechanics—breaking a conceptual logjam that has frustrated the world's smartest scientists for nearly a century.

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If We Had No Moon (Discovery Channel)

What would life on earth be like without the moon? Well, chances are, there wouldn't be any life on earth without the moon. Life – if it had started at all – would still be in the earliest stages of evolution.Scientists use the latest computer simulations to show how an ancient rogue planet – Orpheus – collided with the earth millions of years ago, producing a sizable chunk of debris that eventually became our moon. If that collision had never occurred, we would live in a very different place. Imagine a moon-less weather report – blizzards over the Sahara, floodwaters swallowing the Pyramids, 90-degree temperatures in Antarctica. As the earth wobbles on its axis – unsecured by the moon's gravitational pull – the polar caps would grow and recede at frightening rates. And without the moon, our planet would spin much faster – meaning four-hour days and searing temperatures.

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The Privileged Planet

There is an opinion, common among scientists and intellectuals, that our Earthly existence is not only rather ordinary, but in fact, insignificant and purposeless. The late astronomer Carl Sagan typifies this view in his book "Pale Blue Dot":

But perhaps this melancholy assumption, despite its heroic pretense, is mistaken. Perhaps the unprecedented scientific knowledge acquired in the last century, enabled by equally unprecedented technological achievements, should, when properly interpreted, contribute to a deeper appreciation of our place in the cosmos.

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