The update running on the spacey science sites says it was a natural arsenic deposit in the ground that was at the meteor impact site - symptoms are
consistent with that line type of poisoning....
A team from Johnson Space Center in Houston analyzed two chunks of dark gray rock from the meteorite and told the meeting they look nothing like meteorites from known sources such as Mars.
At such high velocity, fragments may not escape past the "shock-wave" barrier accompanying the meteorite, he said.
"It became very streamlined and so it penetrated the Earth's atmosphere more efficiently," Schultz said. He compared it to a flock of geese drafting behind one another in V-shaped flight.
He said this could challenge conventional wisdom that all small, stony meteorites disintegrate before striking Earth.
"You just wonder how many other lakes and ponds were created by a stony meteorite, but we just don't know about them because when these things hit the surface they just completely pulverize and then they weather," said Schultz.