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Making Model Earths

Modeling how the earth got here can be fun.  One doesn’t have to be right, just creative.  There are certain accepted paradigms to work within, and certain accepted constraints that are taken as a given.  Beyond that, there is a lot of leeway.  This is illustrated by two teams who published in two different journals […]

Not Life on Titan Again

Something weird is going on at the large moon of Saturn.  “What is Consuming Hydrogen and Acetylene on Titan?” teased a press release from Jet Propulsion Laboratory”s Cassini mission: Two new papers based on data from NASA’s Cassini spacecraft scrutinize the complex chemical activity on the surface of Saturn’s moon Titan.  While non-biological chemistry offers […]
Mt. St. Helens, Washington

Mt. St. Helens Recalls Overturned Paradigms

The eruption of Mt. St. Helens in May 1980 not only eroded mountains and canyons, it caused earthquake shifts in geological paradigms.

Titan Continues to Surprise Saturn Scientists

Since reaching Saturn in 2004, the Cassini spacecraft has now made 68 flybys of Titan, the large smog-shrouded moon.  Space.com highlighted a recent picture showing the rings appearing to bisect the moon.  What are some of the latest findings of this alien world – the only moon in the solar system with a substantial atmosphere? […]

More Pow in the Cambrian Explosion

Scientists have found more fossil evidence for sudden emergence of animal body plans in the Cambrian strata.  Two papers in Geology discuss evidence on opposite sides of the world.  One team found bryozoans in Mexico 8 million years older than the record-holders in China,1 and another scientist found diverse echinoderms in Spain dating from the […]

Archaeopteryx Fossil Retains Original Soft-Tissue Material

We are usually told that fossils involve the complete replacement of original living material by rock, except in rare cases (such as amber), because organic material is quickly destroyed.  One of the most famous rock fossils is Archaeopteryx, the bird that has often been claimed to be a missing link from dinosaurs.  An international team […]

Humans and Neanderthals Are One

If Neanderthals bred with modern humans, they are one and the same species.  That must be the case according to the most widely-accepted definition of a species: those who can breed and produce fertile offspring.  The news media are abuzz with Science magazine’s cover story this week, “The Neanderthal Genome.”1  Most anthropologists are now accepting […]

Venus May Be Hot with Active Volcanoes

We already know Venus is hot from its suffocatingly dense atmosphere, but additional heat could be coming from underground.  Results from the European Space Agency’s Venus Express orbiter suggest that volcanoes have erupted any time between now and 2.5 million years ago, a “geologically recent” time compared to the assumed age of the planet (4.5 […]

Another Fossil “Human Ancestor” Claimed

Meet Australopithecus sediba – or is it Homo something?  Scientists are arguing over how to classify new fossils found in a cave at Malapa, South Africa.  Announced today in Science,1 the fossils, alleged to be just under 2 million years old, are producing a strange mixture of hopeful headlines and cautionary counsels from experts.   […]

The Earth Should Have Frozen

According to stellar evolution theory, the earth should have frozen solid four billion years ago, because the young sun could not have put out the heat it does in its middle age.  Called the “faint young sun paradox,” this problem has puzzled scientists for decades.  A new study has failed to solved the puzzle.   […]

Comets Are Cracking Up

An amateur astronomer observed a comet splitting in two, reported (PhysOrg), but it’s not just the comets that are breaking up.  Theories about them have undergone a revolution at revelations they are not all they were cracked up to be.  They used to be pristine remnants of the formation of the solar system.  Analysis of […]

Laetoli Footprints Fully Modern Too Early

Science Daily has reported a bombshell announcement from the University of Arizona School of Anthropology: the famous Laetoli footprints in Africa said to be 3.6 million years old are identical to modern human prints. “Based on previous analyses of the skeletons of Australopithecus afarensis, we expected that the Laetoli footprints would resemble those of someone […]

No Clear Explanation for Saturn’s Rings After 6 Years of Cassini

Those who hoped Cassini would solve the puzzles of Saturn’s rings should read the paper today in Science.1  The state-of-the-rings report, authored by a Who’s Who of ring scientists, is filled with questions.  Titled “An Evolving View of Saturn’s Dynamic Rings,” the report cannot determine their origin, their age, or their composition.  List the points […]

The Copernican Geological Revolution

The Copernican Revolution did not just affect astronomy and physics: it revolutionized geology.

Mars Discoveries Change Paradigms

Mars is under assault by an armada of orbiters gathering intell from the planet with photons and radar beams.  What kind of information has been seized recently? Dry rivers:  Remember the networks of river channels that were telltale signs of water?  Remember the hope for life those images generated?  Some of those riverbeds could have […]
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