Science is an interesting topic, but you have to wonder what National Geographic hopes to accomplish by presenting doomsday scenarios , with authoritative voices like Hakeem Oluseyi to tell how we might be able to survive a neutron star or some other cosmic collision. However, the episode that caught my eye the other night was a scenario in which an ice meteor strikes the earth and causes the sea water to rise at such an alarming rate it would take a 10,000 foot sea wall to stave off total destruction. I was hoping to find the video but no such luck. It's bad enough we are destroying our planet due to our own devices, causing the global temperature and sea level to rise, but here is Dr. Hakeem telling us of situations we have absolutely no control over and would require massive efforts well beyond our collective will to combat or escape our dear planet, as the case may be. It seems nothing we are doing can prepare ourselves for these cataclysmic events, which would lea