Earliest

Jaws, Teeth of Earliest Bony Fish Discovered

Publication: National Geographic News   Date: August 1, 2007   View Article

Fossils of sardine-size fish that swam in ancient oceans are the earliest examples of vertebrates with teeth that grow from their jawbones, according to new a new study.

The fish, which lived 420 million years ago, are a “very modest” beginning for the jaw-and-tooth pattern widespread in nature today, said study co-author Philippe Janvier, a paleontologist at the National Museum of Natural History in Paris, France.

Earliest Galaxies in the Universe Spied by Astronomers

Publication: National Geographic News   Date: September 15, 2006   View Article

The earliest known galaxies in the universe, which formed during the universe’s “dark age” nearly 13 billion years ago, have been spied by two teams of astronomers.

The discoveries, reported separately in this week’s issue of the journal Nature, suggest that galaxies were forming just 700 million years after the birth of the universe.

Weird Australia Rocks Are Earliest Signs of Life, Study Says

Publication: National Geographic News   Date: June 7, 2006   View Article

Weird cone- and egg-carton-shaped formations in Western Australia are almost certainly among the earliest evidence of life on Earth, according to a new study.

The 3.43-billion-year-old Strelley Pool Chert formations, called stromatolites, are sediment structures, not fossilized life forms. But their unusual features have inspired scientists to debate their origin.

© 2008-2010 Collected Writings By John Roach