A sixteen-centimeter (6-inch) tadpole fossil intrigues scientists. Discovered in Patagonia, it could well redefine our ...

All animals have a life cycle, but they can be very varied and different. As part of their life cycle all animals, including humans who are animals too, have offspring which grow into adults.

Frog tadpoles have a remarkable ability to regenerate their tissues—a process that requires a lot of energy, fast. In other animals, rapidly growing tissues, such as tumors and embryos, are thought to ...

The authors conclude that tadpoles respond to the presence of ranavirus by speeding up their growth rate and progressing through successive developmental stages faster early in life.

DESCRIPTION: Boreal toads may reach a length of four inches. They possess warty skin and often have a distinctive light mid-dorsal stripe. Tadpoles are black or dark brown and eggs are black. HABITAT: ...