Stream now with KPBS+ / Watch Wednesday, Jan. 7, 2026 at 9 p.m. on KPBS TV + Encores Sunday, Jan. 11 at 3 p.m. + 9 p.m. on KPBS TV. Scientists investigate colossal explosions in Siberia and other evidence that rapidly melting soil in the Arctic is releasing vast amounts of methane, a potent greenhouse gas. What are the implications for our climate future?