Polyploidy, or the duplication of entire genomes, has been observed in prokaryotic and
eukaryotic organisms, and in somatic and germ cells. The consequences of polyploidization …

Abstract The 'Cambrian Explosion'describes the rapid increase in animal diversity and
abundance, as manifest in the fossil record, between~ 540 and 520 million years ago (Ma) …

Long recognized as a malodorous and highly toxic gas, recent experimental studies have
revealed that hydrogen sulfide (H2S) is produced enzymatically in all mammalian species …

The early diversification of animals (∼ 630 Ma), and their development into both motile and
macroscopic forms (∼ 575–565 Ma), has been linked to stepwise increases in the …

“The Answer to the Great Question... Of Life, the Universe and Everything... Is... Forty-two,”
said Deep Thought, with infinite majesty and calm…“I checked it very thoroughly,” said the …

Many organisms are currently polyploid, or have a polyploid ancestry and now have
secondarily'diploidized'genomes. This finding is surprising because retained whole-genome …

Recent studies have identified a range of new applications of trace-metal concentration data
in the analysis of paleoceanographic systems. In restricted anoxic marine systems, trace …

Hydrogen sulfide (H2S) plays important roles in metabolism and health. Its enzymatic
generation from sulfur-containing amino acids (SAAs) is well characterized. However, the …

Abstract The “Cambrian Explosion” is known for rapid increases in the morphological
disparity and taxonomic diversity of metazoans. It has been widely proposed that this …

To improve estimates of the extent of ocean oxygenation during the late Ediacaran Period,
we measured the U and Mo isotope compositions of euxinic (anoxic and sulfidic) organic …