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This Click & Learn shows that keystone species exist across a variety of ecosystems and can exert their influence in different ways.

This video case study explores the approaches scientists used to identify a mutation that causes retinitis pigmentosa (RP), a progressive disease that leads to blindness.

This film explores the foundational research in the Serengeti National Park, Tanzania, that uncovered many of the ecological principles that govern how animal populations and communities are regulated.

This film explores the species-area relationship, a general ecological rule that describes how the number of species in a habitat changes with area, and shows how it has been applied to the conservation of protected areas.

This interactive module allows students and educators to build models that explain how the Earth system works. The Click & Learn can be used to show how Earth is affected by human activities and natural phenomena.

This interactive module allows students to collect and analyze data from a virtual river to construct biomass and energy pyramids.

This interactive module explores how CRISPR-Cas9 technology works and the many ways in which scientists are using it in their research.

This short video explores the symbiotic relationship between the Hawaiian bobtail squid and light-producing bacteria.

This interactive module explores niche partitioning, a mechanism that enables similar species of animals to coexist.

This video describes the case of a patient with retinitis pigmentosa (RP), a progressive disease that leads to blindness, and how physician-scientist Dr. Ed Stone approached the search for the causal mutation.

This short video explores the secrets behind termites’ power to digest an abundant source of food: wood.

This short video explores the symbiotic relationship between giant tube worms and species of chemosynthetic bacteria.