An era is not a defined number of years. Rather, it is a period of time marked by certain characteristics, such as historical events. In geology, an era is composed of periods.Know More
According to the Encyclopedia Britannica, geological eras encompass millions of years. The main eras, according to geologists, are the Paleozoic Era, the Mesozoic Era and the Cenozoic Era. The Paleozoic Era, for instance, was approximately 291 million years long, while the Mesozoic Era lasted about 185.5 million years. The Cenozoic Era has been about 65.5 million years long so far as it runs to the present day.
Historical eras are defined by certain historical events or a distinctive period of time. For instance, the Elizabethan era is defined by the reign of Queen Elizabeth the First, who was the Queen of England from 1558 to 1603.Learn more about Time & Calendars
The Mesozoic Era is also known as the Age of Reptiles or the Age of Dinosaurs. During the era, dinosaurs were the Earth's dominant form of life.Full Answer >
Time zone lines are not always straight in order to accommodate the desires of nations within the boundaries of the zone. The irregularity is mainly due to political factors and has nothing to do with geography or any other natural cause.Full Answer >
"Old age" is a subjective expression referring to a person in the later stages of life. People debate the specific age at which someone is "old," but "old age" often refers to someone who is retired and who likely requires higher amounts of routine health care.Full Answer >
Websites that offer sunrise and sunset time clocks include FullSpectrumSolutions.com, PatientSleepSupplies.com and Wayfair.com. Each of these websites offers a different type of sunrise and sunset clock.Full Answer >