Discovery Daily Newsletter: One-Way Ticket to Mars Best Bet

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One-Way Ticket to Mars Best Bet Sending astronauts to Mars or other destinations in the solar system without a ride home could cut the cost of space missions and help humans get a leg-up at becoming a multi-planet species. Read More WATCH VIDEO: Man on Mars Could the human race survive on Mars? Third Political Parties Through History The Tea Party may be all the rage this year, but third parties are as American as partisan bickering and congressional gridlock. Read More WATCH VIDEO: Why? Tell Me Why!: Tuesday Vote Why are elections are always held on a Tuesday in November? Toothy Marine Creature Lived Before Dinosaurs These snake-like animals, called conodonts, had rows of sharp, interlocking cone-shaped teeth that raked prey into their mouths. Read More WATCH VIDEO: Get To Know a Duck-Billed Dinosaur Learn about this Cretaceous species. At Discovery we value your privacy. If you would like to be removed from Discovery News emails like this, please click here to our subscription center, where you can manage your account. We recently updated our privacy policy. This policy is effective as of 10/30/07. To see new policy click here . Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © 2010 Discovery Communications, LLC