These extinct shelled cephalopods ruled the ocean for 300 million years. But how they swam and shaped the seas remains a mystery.
Celebrate amazing cephalopods with STEM resources for kids of all ages.
Use student-created comics to summarize learning, report experimental outcomes, and assess prior knowledge.
A century ago, an eclipse proved Einstein right—and altered our understanding of the universe.
Turning hydrogen into a metal at room temperature could lead to new superconductors. But how far off is this super-material?