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Microfossils in Biological News

Life on Earth came from other planets

...teen meteors (carbonaceous chondrites), most impacted by supernova and predating the origin of our solar system. Skeptics dismiss discoveries of microfossils by claiming "contamination." Yet, contamination is the only logical, scientific explanation for how life appeared on this planet. Life on Earth was no...

Microfossils challenge prevailing views of the effects of 'Snowball Earth' glaciations on life

...out the effects of "Snowball Earth" glaciations on life, according to an article in the June issue of the journal Nature Geoscience . By analyzing microfossils in rocks from the bottom of the Grand Canyon, the authors have challenged the view that has been generally assumed to be correct for the widespread di...

January GEOLOGY media highlights

...s may reflect deglacial water from massive ice sheets. These inputs (whatever the source of fresh water) were recorded in deep ocean sediments through microfossils (such as diatoms and foraminifera), and their study allows researchers to estimate past salinity variations for this particular area. Exceptio...

Archaeologist uses satellite imagery to explore ancient Mexico

...focus on environmental change. This part of the study, done in conjunction with colleagues at the University of Colorado at Boulder will analyze plant microfossils in sediment samples collected from a variety of locations, including areas where streams expose sediment layers 10,000 years old. Roughly 10,000 y...

Has the mystery of the Antarctic ice sheet been solved?

...global cooling, and bring climate proxy records into line with climate model simulations. We have been able to use the chemistry of the Tanzanian microfossils to construct records of temperature and ice volume over the interval of the big climate switch. These new records show that the worlds oceans did coo...

A warming climate can support glacial ice

...ochemical and sea level data retrieved from marine microfossils deposited on the ocean floor 91 million years ago ...s, researchers at Scripps Oceanography studied the microfossils to gather geochemical data on the growth and event...ed from the stable isotope record of surface ocean microfossils yielded the same conclusion. These independent...

Microfossils unravel climate history of tropical Africa

...soil bacteria. They applied the method to a marine sediment core taken in the outflow of the Congo River. This core contained eroded land material and microfossils from marine algae. The results show that the land environment of tropical Africa was cooled more than the adjacent Atlantic Ocean during the last ice-...

Oldest animal fossils may have been bacteria

... era as giant bacteria. The discovery "complicates our understanding of microfossils thought to be the oldest animals," said lead author Jake Bailey, a graduate...a. "Our paper offers an alternative interpretation of the most abundant microfossils in the Doushantuo Formation," he added. "The structures that we discuss wer...

'Fruit fly dating game' provides clues to our reproductive prowess

...rs before the mass extinction. Small marine animal microfossils were left virtually unscathed, says Keller. "In all these localities we can analyze the marine microfossils in the sediments directly above and below the Chic...y really study what happened to them by looking at microfossils because these little critters are everywhere at al...

Far more than a meteor killed dinos

...rs before the mass extinction. Small marine animal microfossils were left virtually unscathed, says Keller. "In all these localities we can analyze the marine microfossils in the sediments directly above and below the Chic...y really study what happened to them by looking at microfossils because these little critters are everywhere at al...
Microfossils in Biological Definition

Evolution

...ence of early life is sparse before the evolution of organisms with hard body parts, such as shell, bone, and teeth, but exists in the form of ancient microfossils and the fossilization of ancient burrows and a few soft-bodied organisms. Nevertheless, fossil evidence of prehistoric organisms has been found all ...

Paleontology

...s of animals with backbones, including fossil hominids ( paleoanthropology ). Micropaleontologists study microscopic fossils, including organic-walled microfossils whose study is called palynology . There are many developing specialties such as paleoecology , paleobotany , ichnology (the study of tracks an...

Astrobiology

...amination of meteors from Antarctica which are presumed to have originated from the planet Mars have provided what some scientists believe to be microfossils of extraterrestrial life, although that interpretation of the evidence is still controversial. In 2004 , the spectral signature of methane was dete...
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