The nuclear test monitors pick up `` infrasound '' , or low frequency , waves from about 20 meteors a year -- `` if conditions are right , perhaps as small as a pea , '' she said . Nuclear test sensors picked up meteor 's sound wave as far away as Antarctica . Scientists used that sound to calculate the size of the space rock . Comment:
Nuclear test sensors picked up meteor 's sound wave as far away as Antarctica . Scientists used that sound to calculate the size of the space rock . Comment: