A high school science teacher reported that the students have motivation and learning problems to understand the concept of fossilization. Working with the science teacher, a Web-Based Learning Environment (Web-LE) has been designed by a group of students in the Department of Instructional Technology at University of Georgia to enhance and sustain the motivation of learners in the context of se...

Fossil melanin granules (melanosomes) are an important resource for inferring the evolutionary history of colour and its functions in animals. The taphonomy of melanin and melanosomes, however, is incompletely understood. In particular, the chemical processes responsible for melanosome preservation have not been investigated. As a result, the origins of sulfur-bearing compounds in fossil melano...

An understanding of enamel diagenesis is necessary to ensure sound isotopic palaeodietary and palaeoenvironmental reconstructions. Although carbon isotope signals of browsing and grazing herbivores remain distinct in enamel even after millions of years, subtle alteration of isotopic signatures does occur. To better understand this change we analysed modern and fossil enamel from a number of Sou...

ZhaoHong Han Language Teaching / Volume null / Issue 02 / April 2013, pp 133 ­ 171 DOI: 10.1017/S0261444812000511, Published online: 22 February 2013 Link to this article: http://journals.cambridge.org/abstract_S0261444812000511 How to cite this article: ZhaoHong Han (2013). Forty years later: Updating the Fossilization Hypothesis. Language Teaching, null, pp 133­171 doi:10.1017/S02614448120005...

Bayesian total-evidence dating involves the simultaneous analysis of morphological data from the fossil record and morphological and sequence data from recent organisms, and it accommodates the uncertainty in the placement of fossils while dating the phylogenetic tree. Due to the flexibility of the Bayesian approach, total-evidence dating can also incorporate additional sources of information. ...

The search for microfossils in the geological record has been a long-term challenge. Part of the problem comes from the difficulty of identifying such microfossils unambiguously, since they can be morphologically confused with abiotic biomorphs. One route to improve our ability to correctly identify microfossils involves studying fossilization processes affecting bacteria in modern settings. We...

Abstract Thin sections of three Palaeozoic bryozoans reveal fossilized soft tissues that show the position organic cuticle and internal structures such as membranous sac gut. The fossilization occurred apparently due to fast burial under anoxic conditions. a in Permian trepostome Rhombotrypella superangustata is indicative progressive polypide cycle. Ordovician Graptodictya delicata behind supe...