I found a methuselah: lasts for 1600 generations or so, and I didn't find it on the wiki. x = 6, y = 4, rule = B3/S23 o3b2o$bo2bo$bobobo$2bo! Edit: Here's an interesting one, might've been discovered. Beehive eats Herschel in 73 generations. x = 9, y = 5, rule = B3/S23 6b2o$o4bo2bo$3o3b2o$obo$2bo!