DISCOVERY CHANNEL RANKS AS THE HIGHEST-QUALITY NETWORK FOR THE EIGHTH CONSECUTIVE YEAR IN THE 2008 BETA RESEARCH BRAND IDENTITY OF BASIC CABLE/BROADCAST NETWORKS STUDY

(Silver Spring, Md.) � For the eighth consecutive year, viewers rank Discovery Channel the highest-quality TV network, according to results released today in the 2008 Beta Research Brand Identity of Basic Cable/Broadcast Networks Study. The network also earned first place rankings in several other key study categories. Viewers call Discovery Channel their favorite channel; most distinctive; bold; and, for the ninth straight year, #1 in having many original series. In addition, viewers rank Discovery Channel #1 among networks deemed entertaining and informative (tie).

"In today's world of proliferating media choices, we are honored that viewers continue to recognize Discovery Channel for its high-quality and compelling programming," said Bill Goodwyn, president, Domestic Distribution and Enterprises, Discovery Communications. "Our consistent track record of high marks in this and other Beta studies are further proof of the value that Discovery brings to our distribution partners and subscribers."

Among key demographics, Discovery Channel also ranks #1 in a number of key categories including the following:

� Among viewers age 18-34: #1 for being a favorite channel; informative, having many original series; valuable; high-quality and being distinctive.

� Among male viewers: #1 for being a favorite channel; entertaining; bold/tries new things; having many original series; high-quality and a channel subscribers would like to see in HD.

� Among female viewers: #1 for being informative; bold/trying new things; having many original series and being distinctive.

In other notable results, Animal Planet is #2 for family-oriented programming and for having many original series (tie). Among women, the network also ranks #1 for high-quality (tie).

Discovery recently announced a commitment to deliver 200 all-new original series and specials across its US networks in the 2008-09 season.

About Discovery Communications:

Discovery Communications is the number-one nonfiction media company reaching more than 1.5 billion cumulative subscribers in over 170 countries. Discovery's 100-plus worldwide networks are led by Discovery Channel, TLC, Animal Planet, The Science Channel, Discovery Health and HD Theater, with digital media properties including HowStuffWorks.com. Discovery Communications is owned by Discovery Holding Co. (NASDAQ: DISCA, DISCB), Advance/Newhouse Communications and John S. Hendricks, Discovery's founder and chairman. For more information please visit www.discoverycommunications.com.