"The Daulton et al claim that we have misidentified diamonds is false and misleading, " he said.
BBC: Mammoth-killing space blast 'off the hook'
2.
But having examined closely the carbon spherules purported to contain nanodiamonds in this case, Tyrone Daulton, Nicholas Pinter and Andrew Scott say there has been a misinterpretation.
BBC: Mammoth-killing space blast 'off the hook'
3.
And geoscience consultant Allen West added that Daulton and colleagues had not followed the same protocols and therefore it was no surprise they had came up with a blank.