Larvae of this type of mayflies spend the first three years of their lives in water, their adult lives last for only one day which they use for mating.
While the density of spider silk is less than that of nylon filaments, its tensile...
Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.
The American bison is the largest land animal in North America.
The animation shows the anatomy of turtles.
Bats use ultrasound to navigate and hunt for prey.
Large carnivores, perhaps the best known of dinosaurs.
The animation demonstrates the most important types of feathers and their fine structure.
An ant colony consist of a queen, male ants and workers.