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"That's the finding of a new technique being developed to estimate the size of ancient impactors that left little or no remaining physical evidence of themselves after they collided with Earth.

How convenient, theoretical "impactors" that conveniently vanish leaving no trace they ever hit the earth, and killed all those dinosaurs.Must be true however, because they said so.

Scientists working on the technique used chemical signatures in seawater and ocean sediments to study the dino-killing impact that occurred at the end of the Cretaceous period, about 65 million years ago.

Great. This ones even better. Chemical signatures from things that may or may not have existed, but left no evidence of being there so one can't say either way. But somehow, the KNOW just what chemical signatures they lefty behind, even though they can't tell you what it was made of, snow, rock, frozen methane?

One thing we know,(because they say so) these impacts made all the dinosaurs fall into what are now the saudi oil fields and other large oil fields arounfd the earth.

500 billion of them fell in just in ONE Saudi oil field. There sure were a lot of dinosaurs on the earth when that invisible meteor hit. Zillions of them.

There are two theories regarding the origins of fossil fuels, but no scientists believe the Saudi oil fields resulted from dead dinosaurs. That's just a frequently repeated myth. The commonly accepted theory is that dead plants and animals, (mostly small sea animals), were the origin of our oil, coal and natural gas reserves. If you've ever been in a swamp or bog you can see this in action. Dig a little and you can see the dead blackened foliage that has accumulated in the mud. An alternate theory, (abiogenic petroleum), says that petroleum deposits were produced by activity deep in the earths crust. The Russians like this theory, but it's not widely accepted elsewhere.

Now some dinosaurs undoubtedly did become oil deposits too, but not enough to matter. There simply weren't enough of them.