2) dinosaur. The Columbia Encyclopedia, Sixth Edition. 2001
...The dinosaurs, which were egg-laying animals, ranged in length from 21/2 ft (91 cm) to about 127 ft (39 m). Recognized discoveries of fossilized dinosaur bones date...

3) Cretaceous period. The Columbia Encyclopedia, Sixth Edition. 2001
...Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from approximately 144 to 65 million years ago. The Cretaceous was...