Minerals in the water replace the bone, leaving a rock replica of the original bone called a fossil. Image caption, It’s not just animal and plant remains that can be fossilised. Things like ...

Ammonite fossils, an example is shown here, are sea creatures that became extinct about 65 million years ago. Fossil remains have been found in rocks of all ages. Fossils of the simplest organisms ...

It’s a type of non-fossil fuel production of hydrogen from ... up of experiments and testing of the process on various iron-rich rock types found throughout North America. The team plans to ...

Because so little fossil ... the iron supply is exhausted, however, oxygen begins escaping the seas into the open air. Evidence of a buildup of atmospheric oxygen first appears in rock layers ...

Then he found a similar fossil with downward-tipped spines reminiscent of long, side-swept “emo” bangs. He nicknamed that specimen after the emotional alt-rock genre. On Wednesday, Dr.