USB Type-A. Known as your standard-A, a USB Type-A is the first original design for a USB port that has a flat and rectangular shape. It is mainly used to connect and control other USB devices such as saving data on external storage devices and using a mouse and keyboard.
Cretaceous Period. The Cretaceous period began at the end of the Jurassic period approximately 144 million years ago and extended longer than any period (79 ma) to approximately 65 million years ago. The word Cretaceous comes from the word for chalk and the geological remains do indeed contain heightened chalk deposits.
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.