The Beta Gate, also referred to as the Antarctic Gate, was a second Stargate discovered on Earth. It was found in 1998 by Samantha Carter and Jack O'Neill inside a glacier in Antarctica. The Beta Gate was the planet's original Stargate, having been placed there by the Ancients millions of years ago during their original habitation of Earth. As such, it is one of the oldest known Stargates in the entire Milky Way galaxy Stargate Network, theorized as being as much as 50 million years old. It, along with an outpost, was left behind (in a region that would become Antarctica) when the Ancients left for the Pegasus galaxy in Atlantis. (SG1: "Solitudes", "Frozen") (SGA: "Rising")