Join T2A Chat  on 19 December at 1800 UTC, when we meet explorer Jon Bowermaster as he prepares to kayak on a five-week journey into the ice-packed Weddell Sea of Antarctica.  Bowermaster joins a team of scientists, navigators, and photographers who will follow the fast-changing boundaries of the 500-mile-long Larsen Ice Shelf. The team will collect ice samples, look for signs of pollution, gather aerial footage, and survey the health and populations of local penguins and other wildlife.  Bowermaster was also part of and will discuss the recent international rescue effort that saved passengers of the ship that sank off the coast of Antarctica after hitting an iceberg.