2 ms·

Any links to these reports?

• jacquesm 3y ago
  Found it: https://www.boulder.swri.edu/~bottke/Reprints/National_Academies_NEO_Report_Defending_Planet_Earth.pdf https://www.boulder.swri.edu/~bottke/Reprints/National_Acade... Note that Arecibo is now gone.