Comment on

• Evidence for substantial variations of atmospheric hydroxyl radicals in the past two decades.

  Prinn RG, Huang J, Weiss RF, Cunnold DM, Fraser PJ, Simmonds PG, McCulloch A, Harth C, Salameh P, O'Doherty S, Wang RH, Porter L, Miller BR. Prinn RG, et al. Science. 2001 Jun 8;292(5523):1882-8. doi: 10.1126/science.1058673. Epub 2001 May 3. Science. 2001. PMID: 11337586
• New ages for the last Australian megafauna: continent-wide extinction about 46,000 years ago.

  Roberts RG, Flannery TF, Ayliffe LK, Yoshida H, Olley JM, Prideaux GJ, Laslett GM, Baynes A, Smith MA, Jones R, Smith BL. Roberts RG, et al. Science. 2001 Jun 8;292(5523):1888-92. doi: 10.1126/science.1060264. Science. 2001. PMID: 11397939