Calorie-Free Sweeteners. Stevia. Derived from the leaf of a South American shrub, this natural substance is up to 200 times as sweet as sugar. Stevia-based products like Truvia and Pure Via are made from a purified extract of the plant, called rebaudioside A (Reb A), and sugar alcohols.
The Cenozoic Era was the first era that saw humans evolve. Much of what the common population thinks of as evolution all happened in the Cenozoic Era. The first period of the Cenozoic Era is called the Tertiary Period.Recently, the Tertiary Period has been broken down into the Paleogene Period and Neogene Period.he modern human evolved and became the dominant species on Earth. Other mammals on Earth continued to diversify and branch off into various species. The same happened with marine species. There were a few extinctions over this time period as well, due to the changing climate.
This period is called the Palaeozoic era, and lasted from 540 million years ago until 245 million years. The next period in the Earth's development started 245 million years ago and lasted until 65 million years ago, at which point about 80 to 90% of all animals were killed, with the main exception being birds.