But it wasn't always that way. The space shuttle is now examining the Sahara for vestiges of ancient river beds. Archaeologists have often had to follow their nose, digging based on instinct and hoping to find buried treasure. Now, using radar, archaeologists can see what's under the ground without lifting a shovel. Most importantly, it's an only child.
Most explosions have a shock wave.
If so, it could change scientific assumptions about the creation of the universe. The problem is that different methods of measuring give different answers. It's hard to know who built a statue or where it came from just by looking at it. But a good computer and a strong beam of neutrons, can help give some clues. Most shells or bones decompose or get eaten.