Browse Reference Articles
51 to 60 of 140 articles
-
Ichthyosaur
Ichthyosaurs were giant marine reptiles that resemble a dolphin with large teeth. They lived during a large part of the Mesozoic era, and appeared about 250 million years ago (Ma), slightly earlier ... > more -
Ancient Rome
Ancient Rome was a civilization that grew out of the city-state of Rome, founded on the Italian peninsula around 800 BC. During its twelve-century existence, the Roman civilization shifted from a ... > more -
Trace fossil
Trace fossils are those details preserved in rocks that are indirect evidence of life. While we are most familiar with relatively spectacular fossil hard part remains such as shells and bones, trace ... > more -
Feathered dinosaurs
The realization that dinosaurs are closely related to birds raised the obvious possibility that some dinosaurs had feathers. Fossils of Archaeopteryx include well-preserved feathers, but it was not ... > more -
Structural alignment
Structural alignment is a form of sequence alignment based on comparison of shape. These alignments attempt to establish equivalences between two or more polymer structures based on their shape and ... > more -
Bronze Age
The Bronze Age is a period in a civilization's development when the most advanced metalworking consisted of techniques for smelting copper and tin from naturally occurring outcroppings of ore, and ... > more
Search ScienceDaily
Number of stories in archives: 138,557

