Changes

     - A large crater has been found on the Yucatan Peninsula in Mexico.

     - A large crater has been found on the Yucatan Peninsula in Mexico.

     - The soil near the crater contains significant amounts of chemical compounds common in

     - The soil near the crater contains significant amounts of chemical compounds common in

       meteorites.

       meteorites, but rare on Earth, especially in such concentrations.

     - The soil near the crater shows signs of a tremendous energy release, natural glass, etc...

     - The soil near the crater shows signs of a tremendous energy release, natural glass, etc...

     - We can calculate the energy that would be required to create a crater that size.

     - We can calculate the energy that would be required to create a crater that size.