Many different representations of the timeline have been created, and many approaches developed by informed, trusted sources. We will provide a list of web sites with relevant information. The ...

Prehistoric time line, geologic time scale, photos, facts, maps, and more from National Geographic. Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history.

Write it as a timeline on the board. I like to use a meter stick and be very intentional with my spacing to model time as a scale. I also avoid using the far right of the space to infer time existed ...