The Jet Propulsion Laboratory named its own review panel to look into the loss of the Mars Polar Lander and Deep Space 2 microprobes. The 12-member panel, led by John Casani, will examine the most probable root causes for the failure of the two missions, which piggybacked during the nearly year-long trip to their Dec. 3 arrival at Mars. The three spacecraft have not been heard from since landing and are presumed lost.