The significance of this 110-year-old discovery is that the head contained ribonucleic acid (RNA) molecules, which carry the ...

and animals were scurrying to save themselves from the upcoming Ice Age, a sloth named Sid, a woolly mammoth named Manny, and a saber-toothed tiger named Diego are forced to become unlikely heroes.

while Denis Leary will once again voice the cantankerous sabertooth tiger, Diego. Bridging the gap between the mainline Ice ...