This BLOSSOMS lesson will help students conceptualize the enormity of geologic time and learn about important events in Earth's history. Students will also learn how geologic time can help explain seemingly incomprehensible processes....

An illustration of the development of the planet Earth as a result of a supernova tens of millions of years ago. [10:08]

In this video segment from A Science Odyssey, scientists explain how Earth's age was determined by examining the radioactive rocks in Earth's crust.

Watch Earth form, and learn about Earth's history and the events of deep time. [4:56]

Find out about what the future holds for humanity and the universe after millions and millions of years. [13:31]

Discussion of the relatively recent changes in our ability as a species to shine light on our deep past. [9:53]

How did scientists figure out the age of the earth? Trace the history of Earth Science and the developments scientists made in determining the earth's geologic eras. Scientists asked such questions like, what's up with fossils? Are they...

We use the yard lines to map out our planet's past (and humanity's tiny moment in it). [4:38]

LeBron James asks Sal about how long humanity has been around as compared to the history of the Earth. [8:08]

Learn about iron beads made from meteoric metals predate the Iron Age with this audio lecture. [6:40]

Learn how early Earth may have smelled like rotten eggs with this audio lecture! Lecture discusses bacteria-like creatures living nearly two billion years ago belched hydrogen sulfide, the signature stench of rotten eggs. [11:34]

Mr. Andersen explains the law of superposition and the principle of original horizontality. He uses an animation to explain how rock layers can accumulate over time.

This video tutorial by Bill Nye the Science Guy explores the age of the planet Earth. Discover methods scientists use when determining how the Earth developed and how they categorize these changes into eras. [2:12]