MANKIND'S LATEST STEP ON THE RED PLANET TO BE BROADCAST LIVE ON SCIENCE CHANNEL TUESDAY MAY 13, 1:22 PM ET

-- Science Channel to Broadcast Exclusive Live Coverage & Commentary Sunday, May 25, 2008 --

SILVER SPRING, Md., May 13, 2008 � Science Channel will broadcast live coverage of mankind's next major step in Mars exploration with MARS LIVE: THE PHOENIX LANDS (wt) premiering Sunday, May 25, 2008, from 7-9 PM (ET) and 4-6 PM (PT). Originating LIVE from the Jet Propulsion Laboratory in Pasadena, Calif. and the University of Arizona's Lunar and Planetary Laboratory, the program will give viewers a first look at photos sent back from the Mars surface, and exclusive, in-depth analysis and perspective of the mission's historic scientific implications from NASA Chief Scientist Dr. James B. Garvin, as well as firsthand reactions from scientists including Phoenix Mars Mission Principal Investigator Peter Smith.

"We're incredibly proud that Science Channel will cover this extraordinary live event and offer our audience exclusive analysis of NASA's historic mission," said Clark Bunting, president and general manager, Discovery Emerging Networks. "Science Channel's mandate is to celebrate and understand the full spectrum of science, so we're excited to offer our viewers in-depth commentary of this exciting achievement as events unfold."

In what is designed to be mankind's best effort to date to find life on Mars, the rover has covered 422 million miles over the past nine months. Its mission is to help answer questions about life-supporting conditions on the planet by analyzing ice from the northern Martian arctic using a suite of onboard, state-of-the-art instruments.

Dr. James B. Garvin is the world's leading expert on the surface of Mars. Throughout the broadcast, Dr. Garvin will guide viewers as the Phoenix Lander approaches the surface of Mars, and provide commentary in the critical moments when NASA loses radio contact with the rover. As the first pictures return from the Mars surface, Dr. Garvin will lend valuable perspective on what scientists are seeing and may find, and can speak to what conditions the Phoenix is facing on Mars.

Following MARS LIVE: THE PHOENIX LANDS (wt), Science Channel looks back at recent missions to the red planet with encore presentations of REVEALING MARS at 9 PM (ET)/6 PM (PT) and ROVING MARS at 10 PM (ET)/7 PM (PT). REVEALING MARS walks viewers through NASA's Mars Reconnaissance Orbiter's (M.R.O.) scientific payload and the high-tech instruments used to capture stunning images of Mars. The M.R.O. was launched in 2005. ROVING MARS immerses viewers in the journeys of Spirit and Opportunity, two rovers that explored the red planet on remote, unmanned NASA missions. Spirit and Opportunity launched in June 2003 and landed on Mars in January 2004.

This year, Discovery Communications is partnering with NASA to help commemorate its 50th anniversary with a variety of events and programs celebrating space exploration. Collaborations include:

Science Channel's Second Annual SPACE WEEK premiering July 6-11

Science Matters!, a series of nationwide school assemblies led by past and current astronauts and stressing science literacy

Discovery Channel's WHEN WE LEFT EARTH: THE NASA MISSIONS premiering consecutive Sundays, June 8, 15 and 22 at 9 PM (ET/PT)

An extensive online experience for users to delve deeper into NASA's history and future at http://www.discovery.com/nasa and http://www.sciencechannel.com

M ARS LIVE: THE PHOENIX LANDS (wt) is produced in partnership with Discovery Channel Canada. Anne-Marie Varner is executive producer for Discovery Channel Canada. John Grassie is executive producer for Science Channel.

About Discovery Communications

Discovery Communications is the world's number-one nonfiction media company reaching more than 1.5 billion cumulative subscribers in over 170 countries. Discovery empowers people to explore their world and satisfy their curiosity through 100-plus worldwide networks, led by Discovery Channel, TLC, Animal Planet, Science Channel, Investigation Discovery and HD Theater, as well as leading consumer and educational products and services, and a diversified portfolio of digital media services including HowStuffWorks. Discovery Communications is owned by Discovery Holding Company (NASDAQ: DISCA, DISCB), Advance/Newhouse Communications and John S. Hendricks, Discovery's founder and chairman. For more information, please visit www.discoverycommunications.com.