NOVA ScienceNOW

See the latest information for Manhattanhenge.

• Dr. Tyson: How's the Universe Today?
• The Cosmic Office
• Manhattanhenge
• Journey Through the Center of the Earth
• Don't Ask the Expert: Hollywood Aliens

Season 4

• July 28, 2009

  Moon Smasher · Secrets in the Salt · Bird Brains · Profile: Lonnie Thompson

• July 21, 2009

  The Science of Picky Eaters · Smart Sea Lions and Talking Walruses · Profile: Sangeeta Bhatia · Capturing Carbon

• July 14, 2009

  Marathon Mouse · Dinosaur Plague · Profile: Franklin Chang-Diaz · Space Storms

• July 7, 2009

  Hunt for Alien Earths · Art Authentication · Profile: Maydianne Andrade · Autism Genes

• June 30, 2009

  Diamond Factory · Anthrax Investigation · Auto-Tune · Profile: Luis von Ahn

Season 3

• July 30, 2008

  Phoenix Mars Lander · Brain Trauma · Mammoth Mystery · Profile: Judah Folkman

• July 23, 2008

  Leeches · The Search for ET · Stem Cells Breakthrough · Profile: Edith Widder

• July 16, 2008

  Bird Brains · Space Storms · Profile: Yoky Matsuoka · Smart Bridges

• July 9, 2008

  Saving Hubble · First Primates · Profile: Alfredo Quiñones-Hinojosa · Killer Microbe

• July 2, 2008

  Personal DNA Testing · Art Authentication · Capturing Carbon · Profile: Pardis Sabeti

• June 25, 2008

  Dark Matter · Of Mice and Memory · Profile: Hany Farid · Wisdom of the Crowds

Season 2

• July 24, 2007

  T. Rex Blood? · Epigenetics · Kryptos · Profile: Arlie Petters

• July 10, 2007

  Sleep · CERN · Emergence · Profile: Julie Schablitsky

• January 9, 2007

  Aging · Space Elevator · Maya · Profile: Bonnie Bassler

• November 21, 2006

  Mass Extinction · 1918 Flu · Profile: Cynthis Breazeal · Papyrus

• October 3, 2006

  Asteroid · Island of Stability · Obesity · Pofile: Karl Iagnemma

Happy Birthday, NASA

Neil deGrasse Tyson is the same age as NASA, and both have come a long way in 50 years.

Aired: July 30, 2008 (1:48)

Intelligent Life?

What would aliens conclude about intelligent life on our planet if they picked up our broadcast signals?

Aired: July 23, 2008 (1:55)

The Northern Lights

Some of the most challenging problems in physics are rooted in the most beautiful-to-behold sights.

Aired: July 16, 2008 (1:56)

Telescopes in Space

Neil Tyson describes the uproar in 2004 after NASA announced it had cut funding to repair the Hubble.

Aired: July 9, 2008 (2:03)

Bad News and Uncertainty

Neil deGrasse Tyson muses about how scientists approach uncertainty and bad news.

Aired: July 2, 2008 (2:00)

Dark Matter and Dark Energy

According to Neil deGrasse Tyson, dark matter and dark energy could just as well be called without a clue A and without a clue B.

Aired: June 25, 2008 (2:02)

Unsolved Problems

Our series host loves puzzles—they're fun and challenging. And to him, the greatest of these puzzles of all are the laws of the universe.

Aired: July 24, 2007 (1:47)

Tiny Things of Great Import

Neil Tyson explains how the study of the smallest particles offers insight into the biggest event that ever was, the birth of the universe.

Aired: July 10, 2007 (1:26)

Aging Stars

Do all stars live to the same age? Are some immortal? Learn about aging in the cosmos.

Aired: January 9, 2007 (1:53)

Looking Back in Time

How can light show us the history of the universe?

Aired: November 21, 2006 (1:41)

Asteroid Impacts and Extinction

Find out why we can't live with asteroids and we can't live without 'em.

Aired: October 3, 2006 (1:22)

Phoenix Mars Lander

NASA's latest robot has already found frozen water and is looking for more signs that the Red Planet could support life.

Aired: July 30, 2008 (11:33)

The Search for ET

Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?

Aired: July 23, 2008 (11:18)

Space Storms

Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth.

Aired: July 16, 2008 (9:51)

Saving Hubble

Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.

Aired: July 9, 2008 (13:00)

Dark Matter

Turns out most of the universe is held together by a mysterious, invisible substance.

Aired: June 25, 2008 (13:50)

CERN

Beneath the Alps, the mother of all particle accelerators nears completion.

Aired: July 10, 2007 (12:25)

Space Elevator

Can we build a 22,000-mile-high cable to transport cargo and people into space?

Aired: January 9, 2007 (11:43)

Mass Extinction

What caused the mother of all extinctions 250 million years ago?

Aired: November 21, 2006 (13:16)

Asteroid

Will a doomsday rock the size of the Rose Bowl hit Earth in 2036?

Aired: October 3, 2006 (12:00)

NOVA scienceNOW, Commenting on antimatter and what an encounter with an antimatter alien might be like.