ScienceDimetrodon with 'steak-knife' teeth was more terrifying than T. rex With teeth like steak knives, the 12-foot-long Dimetrodon may have been far more frightening than T-rex. They were also the distant ancestor of all mammals, including rabbits.by James Maynard
ScienceAncient fish Tiktaalik roseae with hips and limbs could be missing evolutionary linkby Maryanne Moll
ScienceModern day carnivorous mammals' early ancestor was a tree dwelling, squirrel-like creatureby Maryanne Moll
SciencePrehistoric shark nursery discovered in Illinois sheds light on breeding habits of early predatorsby Alex Saltarin