continent,mean_extant_mass,mean_extinct_mass,pvalue
AF,31794.525730180805,970038.4615384615,4.986430532040327e-26
AUS,17484.88260869565,188355.55555555556,2.683409674659177e-11
Insular,12431.58962882096,95177.912,0.007234890247764752
NA,11071.727358490565,735076.1025641026,6.975384521169891e-25
SA,4126.675292740047,985889.1315789474,1.3686447932512732e-62