Mission controllers for NASA’s Mars Polar Lander and the accompanying Deep Space 2 microprobes will continue attempting to communicate with the lander and the probes throughout the weekend. Controllers did not hear from the spacecraft in their first few attempts to communicate with the lander and the probes during the first 12 hours after the scheduled landing time. The Deep Space 2 team will try to contact the probes approximately every two hours. The next opportunity for the Mars Polar Lander to contact Earth will be on Saturday evening, Dec. 4 at about 8:30 p.m. PST.