Dino-era Mammal the “Jurassic Mother” of Us All?

Publication: National Geographic News   Date: August 24, 2011   View Article

A tiny, shrew-like creature of the dinosaur era might have been, in a sense, the mother of us all.

Named the “Jurassic mother from China” (Juramaia sinensis), the newfound fossil species is the earliest known ancestor of placental mammals—animals, such as humans, that give birth to relatively mature, live young—according to a new study.

The 160-million-year-old specimen pushes back fossil evidence for the evolutionary split between the placental and marsupial lineages by 35 million years. Although it’s unclear if the creature is a direct ancestor of modern placentals, it’s “either a great grand-aunt or a great grandmother,” the study authors say.

9 links in the dinosaur-to-bird transition

Publication: MSNBC.com   Date: February 3, 2009   View Article

Scientists have plenty of strong evidence that birds evolved from dinos. Check out nine links in the transition from dinosaurs to birds.

Lack of Clouds Amplified Dino-Era Warming, Study Says

Publication: National Geographic News   Date: April 10, 2008   View Article

About 100 million years ago, during the age of dinosaurs, a warming spell caused cloud cover to drastically decrease, helping drive temperatures even higher, according to a new study.

Sea Levels to Plunge Long Term, Study of Dino-Era Says

Publication: National Geographic News   Date: March 6, 2008   View Article

About 80 million years ago—a time when dinosaurs ruled the Earth—global sea levels were roughly 560 feet (170 meters) higher than they are today, according to a new study.

© 2008-2010 Collected Writings By John Roach