fossil record


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fossil record

the remains of organisms, or traces of their existence (such as footprints), present in the rock strata and forming a history of the development of life from its origins on earth. The record is very largely incomplete due to the comparative rarity with which fossils are formed, but provides evidence of evolution having taken place, particularly where long series of a particular form, such as the horse, can be traced over an extended period of time.
References in periodicals archive ?
AFRICA OVERLOOKEDThe first is that while Africa is widely acknowledged as the birthplace of humankind, its incredibly varied fossil record is often overlooked.
Instead of relying on the fossil record alone, we used a 'molecular clock' approach to compare differences in the make-up of genes of living species .
But until now, the fossil record went back no further.
Felix Marx has worked primarily on the fossil record of the earliest baleen whales (mysticetes), while Olivier Lambert has studied principally the fossils of extinct toothed whales (odontocetes).
Examination of fossil records by scientists from the University of Bath determined that the asteroid's impact had been much more severe than previously thought.
Our model provides an explanation for why the fossil record looks the way it does, with many Cambrian fossil groups on some continents but few on others," notes study coauthor Tim Raub, a lecturer at Scotland's University of St.
Until now, studies linked softshell turtles with a smaller semi-aquatic group called mud turtles, despite the fact that softshells appear in the fossil record long before their mud-loving counterparts.
The team, including researchers from the Natural History Museum in London, quantified the anatomical and genetic differences between living animals, and established a timeframe over which those differences accumulated with the help of the fossil record and intricate mathematical models.
Many of the gaps in the fossil record that remained unfilled in Darwin's time now throng with creatures, such as the ones used to chronicle the 48-million-year series of evolutionary changes between whales and their predecessors (SN: 9/22/01, p.
Predator-prey interactions and their evolutionary consequences have been documented extensively in the fossil record (Dietl & Kelley 2001, Kelley et al.
From noticeably broad gaps in the fossil record (which Darwin himself commented on) to questions of extreme improbability with regard to genetic mutations (nearly all mutations are harmful, and most others are useless--a strike against the idea that drastic evolutionary changes could be brought about by mutations), Reclaiming Science From Darwinism dares to present the case against macroevolution on purely scientific grounds, not theological or spiritual grounds.
School of Medicine) in putting together this work was to summarize the mammalian fossil record of the Early Cenozoic period and what it has show with regard to the origin and early adaptive radiations of the major clades of today's extant mammals.