Phoebe Cohen

Using Carbon Isotopes in Astrobiology: Origin of Life and beyond part of Teach the Earth:Teaching Activities
Carbon isotopes are used in many different ways by scientists to reconstruct Earth's past. For example, we can use carbon isotopes to determine when life first evolved on Earth, and to learn more about what ...

Fossils or Not? part of Teach the Earth:Teaching Activities
The goal of this activity is to help students think about how, why, and where fossils are preserved in the geological record. This activity can be done using the website Macrostrat or the mobile app Rockd. Using ...

The Paleobiology Database: Diversity and Extinction in the Phanerozoic (as viewed through the eyes of a bivalve) part of Paleontology:Activities
A key question in paleobiology is how diversity, origination, and extinction have changed over time. Given that species are missing from the fossil record this is hard to determine directly. However, we can measure ...