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the Guardianfrom the Guardian

Fossil Ida: Extraordinary find is 'missing link' in evolution

Ida, one of the most complete primate fossils ever found, a 47-million-year-old human ancestor

Dinosaur tracks in prehistoric limestone are removed from the bed of the Paluxy River in Texas

Crinoid fossils. Rock containing crinoid (or sea lily) fossils. These are Scyphocrinus elegans crinoids from the Silurian/Devonian period (about 440-360 million years ago). Crinoids are marine echinoderms that appear as early as the Ordovician period (500 million years ago).

150 million years old fossil fish discovered in China, from the Mesozoic Jurassic period

Trilobite, which belongs to a group of arthropods that became extinct about 251 million years ago. The species shown is Walliserops trifurcatus, and it was collected from ocean sediments in Morocco that date to the Devonian Age, some 385 to 359 million years ago.

About.com Educationfrom About.com Education

Spinosaurus - Bigger than T. Rex, and Every Bit as Nasty

People say if t-rex and spino went head to head in a fight on land that t-rex would win. Actually spino has a better chance. His long jaw and claws give him the advantage. Also hid bigger than t-rex!!!!T-rex just has a muscular head as a weapon nothing else. Therefore spino would probably win.

Dunkleosteus--an armored predatory fish from over 350 million years ago. Instead of teeth, it had flat, overlapping plates of bone that worked together like shears.

National Geographic Newsfrom National Geographic News

Biggest Fossil Spider Found

The biggest known fossil spider has been found in China, a new study says. Measuring nearly 1 inch (2.5 centimeters) in length, the 165-million-year-old fossil was uncovered in 2005 by farmers in Inner Mongolia.

Velociraptor is a genus of dromaeosaurid theropod dinosaur that lived approximately 75 to 71 million years ago during the later part of the Cretaceous Period. Two species are currently recognized, although others have been assigned in the past.

Fossilized dinosaur eggs and embryos reveal a wealth of information about the dinosaur reproduction, development, and behavior. Large dinosaur nests that have been found in the United States, Argentina, and Mongolia showed that some dinosaurs nested in huge groups and that they return to their nesting grounds year after year.

Prehistoric marine reptile fossil has embryo inside - Polycotylus latippinus is a marine reptile which lived about 78 million years ago. The fossil, which is 15.4' (4.7 m) long, has an embryonic skeleton inside, including little ribs, 20 vertebrae, shoulders, hips and paddle bones, resolving the mystery of its reproduction (live birth). Scientists had long thought the creature was not built to crawl on land to lay eggs, but there was no evidence to support the theory