A collection of short commentaries on scientific papers published in 1991, covering topics such as Permian trees, molecular genetics, epigenetics, inheritance of paternal mtDNA, water and formation of petroleum, water in mantle rocks, impacts, Ordovician volcanism, molecular phylogenies of ratites, termites, cichlids and sabertooths, osteocalcin in dinosaur bones, fossil flowers, origin of life, Precambrian predation, stromatolites, Cambrian Explosion, quality of fossil record, rapid speciation, tree biogeography, Miocene ape, fossil dermopteran, Asian marsupial, dinosaurs, mammal-like reptile. Published in Origins v. 19, n. 2.

A review of the book, The Age of the Earth. Presents the standard interpretation of radioisotope data. Published in Origins v. 19, n. 2.

The current scientific picture of the origin of the Universe seems at odds with the Genesis account. Is this a serious problem for those who believe the latter to be reliable? Are there ways to harmonize the two? Or should we be looking for alternatives to the so-called Standard Model for the origin of the Universe? Published in Origins v. 19, n. 1.

The pipes and dikes in Kodachrome Basin have come from the sedimentary layers below, and raise interesting questions regarding the amount of time involved in their formation. Published in Origins v. 19, n. 1.

The purpose of this essay is to examine the intellectual roots and the current status of the discussion concerning progressive creationism and to identify and evaluate eight theological implications of affirming the presence of death for millions of years prior to the appearance of humans in the geologic column. Published in Origins v. 18, n. 2.

Dates calculated from radiocarbon and amino acid racemization show conflict. Analysis of the discrepancies and use of a radiocarbon conversion published earlier, some inferences are drawn regarding the cooling of the earth after the biblical flood. Published in Origins v. 18, n. 2.

Biomolecules decompose rapidly enough they are not expected to last for millions of years. Discovery of biomolecules in fossils is difficult to reconcile with the purported ages of these fossils, and suggests the ages are much younger, as expected in a biblical worldview. Published in Origins v. 18, n. 2.

The unnatural mixture and the rapid stratigraphic shifts of fauna seem to require catastrophic water transport into the area. The large geographic extent precludes a local event. Creationists suggest that a world-wide flood could produce results as seen in the Santana Formation and is a better explanatory model.

In the early development of the theory of evolution by natural selection, two men stand out as having played a central role: Charles Darwin and Alfred Wallace. Both men traveled widely and were keen observers of nature. For both men, visits to islands played an important role in developing their understanding of nature. Darwin's visit to the Galapagos Islands is of special interest.

Cultural legends of a prehistoric global flood are found throughout the world. The frequency and widespread nature of these stories imply an actual historical event as their basis. Published in Origins v 17, n. 2.

This is an attempt to develop a methedology for converting carbon-14 ages into real time in a biblical context that fixes the date of the global flood at about 5,000 years ago. A table is provided of sample converted ages. Published in Origins v. 17, n. 2.

A review of the book, Absolute Age Determination. An authoritative description is provided of the methods of age-dating used to estimate the age of the earth. Published in Origins v. 17, n. 2.

The approach outlined in this paper suggests that the radiometric age assigned to the inorganic minerals associated with a fossil is more a reflection of the characteristics of the source of this inorganic material than an indication of the age of the fossil. Published in Origins v. 17, n. 2.

A model of an ice age caused by the Genesis flood is summarized. It proposes solutions to a number of ice-age problems. Published in Origins v. 17, n. 2.

Geologic features of the KT boundary present interesting evidence relating to possible causes of the mass extinction. The widespread existence of the boundary clay has been interpreted as evidence for a worldwide event at the boundary. Published in Origins v. 17, n. 1.

A recent report that the earth's magnetic field must have reversed within a period of several months stimulates interest in the question of multiple magnetic reversals in the geological record and how much time is required for them to occur. Published in Origins v. 16, n. 2.

A review of the book, Principles of Isotope Geology. An authoritative description of radioisotope dating and use of stable isotope ratios. Published in Origins v. 16, n. 1.

The new theory of surface metabolism suggests that the forerunners of living matter were formed underwater, on metallic surfaces. While the theory of surface-metabolism represents a prodigious effort to explain the origin of living matter, it falls far short of its goal. Published in Origins v. 16, n. 1.

A few scientists advocate an expanding earth as an alternative to plate tectonics. Although there are some phenenomina not well explained by plate tectonics, the expanding earth theory is not a satisfactory replacement. Published in Origins v. 16, n. 2.

The layers of sedimentary rock that we see over the surface of the earth usually appear as parallel features that are often spread over wide areas. What does not appear to the casual observer is that between some of these layers major portions of the geologic column are missing. Published in Origins v. 16, n. 2.