Researchers have discovered 500 million-year-old fossilized embryos. Dating back to the Cambrian Explosion, they emerged during a time when most phyla of marine invertebrates first appeared. The discovery is offering a rare opportunity for scientists to study the origin and development of our planet's oldest animals. » 4/14/14 7:30am 4/14/14 7:30am

Embryonic bats see no evil, speak no evil, and lie there looking…

The black mastiff bat (Molossus rufus) grows to be about 30 grams, but these little guys are just embryos, their bodies hairless, their eyes closed, and playing inadvertent tribute to two of the three wise monkeys. » 10/27/12 5:00pm 10/27/12 5:00pm