Also called Splenda, and sold in yellow packets, itâs made from a chemically tweaked version of sugar that isnât absorbed by the body. The sweetener is used in a bevy of products, such as soft drinks, cereals and baked goods. Pros: Because sucralose can withstand heat, you can use it for cooking and baking.
Geological timescale. Triassic period: 250â200 million years ago. Jurassic period: 200â145 million years ago. Cretaceous period: 145â65 million years ago. Dinosaurs roamed the planet for about 165 million years, during a time in the Earthâs history called the Mesozoic Era. It is difficult to imagine how long this was, until we compare it with ourselves: humans have lived on Earth for less than two million years. During the Mesozoic Era, the Earthâs landmasses changed dramatically, new seas were formed, and plants and animals evolved.
245 to 208 million years ago. 1  During the Triassic period, all land on Earth existed as one enormous mass. It was called Pangaea. 2  Some reptiles, frogs, turtles and crocodiles existed earlier, but dinosaurs didnât appear until late in the Triassic period. 3  The period marked the rise of small, lightly built dinosaurs. The first mammals evolved during the Triassic period. Most of the plants that existed were evergreens. The period ended with a mass extinction that wiped out most animals and reptiles. An entire order of plants or animals dies out in a mass extinction. The dinosaurs that survived flourished in the next period, the Jurassic. Dinosaurs that lived during the Triassic period include: