ABCD

NUMBER OF HARPOONS IN SPACE by year [[A line graph with the x-axis numbered from 1950-2020 in ten year increments an the y-axis numbered 0-3. A red line rests at 0 until 1970 at which pints it spikes to 1, which is labeled 'Apollo 12 rum incident'. It return to 0 and shoots up to 2 at 2004. This is marked 'Rosetta Comet Mission launched carrying lander with harpoon tethers'. The line plateaus at 2 into the future.]] {{Title text: To motivate it to fire its harpoons hard enough, Rosetta's Philae lander has been programmed to believe it is trying to kill the comet.}}