From giant stick bugs to rarely seen sea creatures, these animal videos fascinated us—and led to new scientific discoveries.

Discover which species star in “The 12 Days of Christmas,” how they live, and whether they’d enjoy life as unusual holiday gifts.

From caterpillars disguised as the dead to narwhals that play with their food, here are the animal tales that we loved in ...

Abstract: This paper explores a novel class of event-triggered mechanisms for nonlinear systems utilizing output-feedback control. Initially, an output-feedback state observer is designed to estimate ...