Roger Buick

2 ta ish

University of Washington

1. Air density 2.7 billion years ago limited to less than twice modern levels by fossil raindrop imprints

   Sanjoy M. Som, David C. Catling, Jelte Harnmeijer +2

   Maqola20123 iqtibos

   ABIABI:AkademIndex/2026.other.018414

2. Earth's air pressure 2.7 billion years ago constrained to less than half of modern levels

   Sanjoy M. Som, Roger Buick, James W. Hagadorn +4

   Maqola20163 iqtibos

   ABIABI:AkademIndex/2026.other.018499