When Dinosaurs Ruled Film

160 million years ago in the Jurassic Period nonflowering plant forests of gymnosperms fed the giant saurapod dinosaurs like Barasaurus. The name means “Heavy Lizard.”The gymnosperms were the dominant land plants.
400 million years ago plants started onto the land. At @ 230 million years ago during the Triassic Period the supercontinent of Pangea began to separate north and south then east and west into the four major land masses of today.
Dr. Philip Curry of the Royal Tyrell Museum studies ancient saurapod gizzard stones which these dinosaurs used to break down the gymnosperm plants that they were eating. They had to do this because their simple peg-like teeth would not allow them To chew their food.
Dr. Peter Crane of the Chicago Filed Museum studies fossils of the first angiosperms (flowering plants) from West Water Canyon in Utah.
Dr. Carl Nicolas of Cornell University an entomologist studies angiosperm insect relationships. Insects were early established a pollinators of flowering plants.
Flowering plant dominance caused a decline of the cone bearing plants. Flowering plants can fertilize in as little as 3 minutes as opposed to conifers which can take up to 6 months.
Dr. Elizabeth Browers of the United States Geological Survey and Dr. Ralph Taggart of Michigan State University study fossil conifers and hadrosaurs on the Alaska North Slope.
The hadrosaur called Edmontosaurus fed exclusively on conifer needles. This animal migrated in herds to get to these trees which were primarily in the north which was a cold region. They had to be warm blooded to survive such a climate.
On the Red Deer River often called the River of Time in Alberta Canada fossils of the last of the dinosaurs have been found. These dinosaurs were of a type called Ceratopsian dinosaurs. An example is Triceratops. These dinos fed on flowering plants. They had made the adaptation.
Dr. Yamoto of Kobi University, japan studies relationships between mammals and flowering plants in seed dispersal. His studies in coevolution are done in southeast Asia and Africa. He has noted that dinosaurs had no such interrelationships.
@ 65 million years ago an asteroid nearly six miles across struck the earth generating giant tidal waves, a fire storm, and a dust cloud cover causing a winter-like cooling of the earth which caused the extinction of the last of the dinosaurs.
Mammals survived this disaster and supplanted the dinosaurs as the dominant animals on the planet.