Cave Deposits Reveal a Permafrost-Free Arctic - Eos Mineral cave deposits from northern Siberia show that the region was permafrost free during the late Miocene period, when Earth was warmer than today.

"...when the earth was 4.5⁰C higher than it is today...". According to the most formerly reliable study, we were on track for 3.7⁰C by end of THIS century. Due to #FeedbackLoops and the #MethaneBomb we likely could be at 6-10⁰C (that's >4.5⁰C from today)

#ProgressivesOnlyOrLetItBurn
#EndFossilFuels