31. Air strikes destroyed 39 PAVN supply trucks and set off 221 fires or secondary explosions while also cratering the road. 32. "It's a very interesting idea that is based on very thorough knowledge of cratering dynamics," 33. This formation is not believed to be due to secondary cratering because it is not radial to a suitable source crater. 34. In a very general sense, the lunar history of impact cratering follows a trend of decreasing crater size with time. 35. Smaller bodies, without tidal heating, cool more quickly; and their geological activity ceases with the exception of impact cratering . 36. If true, the vast majority of impacts happened in that epoch, whereas the cratering rate has been much smaller since. 37. The last two tests, Operation " Jangle ", evaluated the cratering effects of low-yield nuclear devices. 38. Earnings got hit " because the hardware business is cratering , " said Thomas Galloway, an analyst at Kadick Inc. 39. The data, they said, also provided evidence for a striking increase in the cratering rate over the last 400 million years. 40. The team examined close-up surveyor images of volcanoes and lava flows and found that some had a distinct lack of cratering .
