Landing and take-off are two sides of the same coin, and a good vehicle must be capable of both. Vikram lander has proved to be equal to the task. On August 23, it demonstrated its ability to gently land on the lunar surface. But can it take off from there? If it could, then its successor could be equipped to return to the earth, perhaps with rock and soil samples. On Monday, ISRO fired thrusters on the lander, which lifted the spacecraft off the ground to a height of about 40 cm, and it then moved horizontally for a distance...