ATLANTA - Cox Communications, Inc. announced today an agreement with Discovery Communications that will pave the way for a significant expansion of its HD line-up with four high-definition networks -- Discovery Channel, TLC, Animal Planet and The Science Channel. These HD networks will be launched on a market-by-market basis.

"This agreement for HD launches of Discovery Channel, TLC, Animal Planet and The Science Channel is a thrilling development for our customers. The programs featured on these channels are ideally suited for delivery in high definition," said Pat Esser, President, Cox Communications. "As our customers' appetites for HD content grow, we will continue to expand our HD line-up with high-quality programming to ensure that we offer a robust selection of the best HD channels in our markets. In fact, we have dozens of new HD channels slated for launch this year."

With the addition of Discovery's family of HD services, Cox customers will have access to a wide-ranging slate of real-life HD programming spanning content categories such as exploration and adventure, natural history, lifestyle, science and technology, wildlife and history, among others. Capitalizing on the superior picture and sound quality offered by high-definition technology, Discovery has invested millions in original HD content, bringing landmark programming events to viewers such as the groundbreaking, Emmy-award winning natural history series PLANET EARTH and DISCOVERY ATLAS HD.

Cox customers also will be able to experience their favorite programs in stunning 1080i clarity for the first time, including the danger, excitement and grime of Discovery Channel's hit series DEADLIEST CATCH and DIRTY JOBS; the adventures of TLC's much-loved Roloff family from LITTLE PEOPLE BIG WORLD; all the antics and drama of Animal Planet's MEERKAT MANOR; and the wonder and mystery of the red planet with The Science Channel's MARS RISING; to name just a few. Cox continues to offer Discovery's standalone HD network, HD Theater, featuring viewer favorite SUNRISE EARTH in addition to a broad array of rich, original HD content across several categories such as world cultures, wildlife, high-end auto and adventure. Cox's actual HD channel line-up will vary by market.

"Since launching Discovery HD Theater in 2002, interest in HD has exploded and viewers have continuously demanded more HD content from Discovery," added David Zaslav, president and CEO, Discovery Communications. "As seen with the Emmy-award winning series, PLANET EARTH, Discovery's non-fiction genres truly come alive in HD, making our channels top destinations for viewers. We are pleased to be working with our long-time partners at Cox to bring their customers HD simulcasts of Discovery's most popular networks and to help drive greater adoption of HD services."

About Cox Communications:

Cox Communications is a multi-service broadband communications and entertainment company with more than 6 million total residential and commercial customers. The third-largest cable television company in the United States, Cox offers an array of advanced digital video, high-speed Internet and telephony services over its own nationwide IP network, as well as integrated wireless services in affiliation with Sprint (NYSE: S). Cox Business is a full-service, facilities-based provider of communications solutions for commercial customers, providing high-speed Internet, voice and long distance services, as well as data and video transport services for small to large-sized businesses. Cox Media offers national and local cable advertising in traditional spot and new media formats, along with promotional opportunities and production services. Cox Communications wholly owns and operates the Travel Channel. More information about the services of Cox Communications, a wholly owned subsidiary of Cox Enterprises, is available at www.cox.com/espanol, www.coxbusiness.com y www.coxmedia.com.

About Discovery Communications:

Discovery Communications is the number-one nonfiction media company reaching more than 1.5 billion cumulative subscribers in over 170 countries. Through TV and digital media, Discovery's 100-plus worldwide networks include Discovery Channel, Animal Planet, Discovery Science and Discovery HD. Discovery Networks International distributes 15 international brands, reaching 781 million cumulative subscribers with programming available in 35 languages. 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.

Contacts: David Grabert: 404-269-7054
David.Grabert@cox.com
Catherine Frymark: 240-662-2934
Catherine_Frymark@discovery.com