FOR EVERY SPECIES , 1000 SPECIES HAVE BECOME EXTINCT IN LAST 550 MY

PERMIAN EXTINCN-GONE TRILOBITES,

SIBERIAN VOLCANOES-CO2, GREENHOUSE, H2S SUFFOCN, 9/10 SPECIES DIED OUT

PANGEA-



10 MY RECOVERY


WINNER-DINOSAUR- CONTD 150 MY