Dating Methods – Page 61

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Discovery Upsets Geological Dating

November 17, 2011

For a long time, geologists have used microscopic crystals called zircons as “time capsules” for dating rock strata. The tiny crystals are so durable it was believed they were virtually impermeable. Now, however, inclusions inside the zircons appear to be vastly different in age. This could have drastic effects on how certain formations are dated.

Biology

Whale Fossils: Challenge or Support for Evolution?

November 14, 2011

When most fossils consist of small shelly creatures, finding a whale is indeed big news. Two whale fossil discoveries on opposite sides of the world are spectacular and puzzling. Do they support the theory that whales evolved from land mammals?

Astronomy

Space Physics and Fables

November 9, 2011

Physics is supposed to be the king of “hard science” because of its precise mathematics, predictability and falsifiability. When transferred off our planet, however, it seems speculation is the order of the day.

Astronomy

New Worlds

October 28, 2011

Members of our solar system that were little more than points of light for decades or centuries have now become familiar family members, seen up close and personal by spacecraft. Here are introductions to three worlds that are no longer mere names in a catalog. Even the names of members in this trio may be unfamiliar to some. They’re worth getting to know.

Awards

The Blind Men and the Ape Man

October 25, 2011

“We have all seen the canonical parade of apes, each one becoming more human. We know that, as a depiction of evolution, this line-up is tosh. Yet we cling to it. Ideas of what human evolution ought to have been like still colour our debates.” So said Henry Gee, editor of Nature. Are other icons coloring scientists’ views of human origins? How close are they to describing scientifically where we come from?

Bible and Theology

NCSE Takes on Creation Geologists

October 23, 2011

The science of geology operates in parallel universes. There are the mainstream, secular geologists in the Geological Society of America who have complete hegemony in the secular universities, the mainline journals and the secular press. Then there are the creation geologists, who publish in their own journals; these hardly enter the awareness of the other geologists. Once in a while, though, like disturbances in the Force, emanations from the creation universe into the secular universe are felt. The National Center for Science Education has become so alarmed at these emanations that they have warned secular geologists to (1) pay them no attention, and (2) pay attention.

Dating Methods

Ski Enceladus

October 22, 2011

Want the ultimate in powder snow? Ski Enceladus, a little moon of Saturn. The snow is deep and vast. Drawbacks: except for occasional craters and steep canyons, the land is flat; there are no ski lifts; there is no air; you would weigh one or two pounds, and transportation will cost you billions of dollars. Other than that, science news outlets are advertising it as a great place for snow lovers!

Dating Methods

Mercury Messenger: Surprise!

September 30, 2011

As boring as the moon? Just a burned-out cinder? Not Mercury. True to tradition for planetary exploration, the MESSENGER spacecraft has served up a plate of surprises about the innermost planet. In orbit since March, the ship is sending theorists back to the drawing board to figure out a number of puzzling phenomena, some unique to Mercury. Commentators fall into two categories: those that are flabbergasted, and those who say all is well.

Dating Methods

Where Do Gems and Precious Metals Come From?

September 7, 2011

Gold, diamonds, and other precious metals and gems... they are found close to the surface of the earth where humans can mine them and make jewelry. But they shouldn’t be there. Heavy elements should have sunk deep into the core of the Earth soon after it was formed. Wait till you hear some of the latest ideas about how precious metals and gems arrived near the surface. Maybe they shot up from the mantle. Maybe they came from outer space.

Early Man

Early Man Was Like Us

September 5, 2011

Human evolution theory has been dealt more body blows this month, raising questions whether it can sustain any more injuries after a decade of repeated punches and concussions.

Biology

Archaic Humans Are One With Us

August 12, 2011

According to the biological species concept, two varieties of anything are considered one species if they can interbreed and produce fertile offspring. Applied to humans, new evidence suggests that Neanderthals and the recently-discovered Denisovans were members of the human species. According to New Scientist, “On the western fringes of Siberia, the Stone Age Denisova cave has surrendered precious treasure: a toe bone that could shed light on early humans’ promiscuous relations with their hominin cousins.” Since one can only be promiscuous within the same species, this puts enormous pressure on evolutionary timelines that assume the Denisovans split from the Neanderthals 300,000 years ago.

Dating Methods

Another Crash in Lunar Tunes

August 4, 2011

Our moon has two faces. One is the familiar man-in-the-moon side that always faces Earth. The other side is mountainous and heavily cratered, possessing a thicker crust with almost none of the large impact basins we see as dark maria on the Earth-facing side. The giant impact theory for the origin of the moon – that a Mars-size object hit the Earth and the debris coalesced into our planetary companion – has been controversial since it was first proposed. Will adding another impact help? It all depends on what one means by “scientific progress.”

Astronomy

Planetary Eruptions

July 29, 2011

Eruptions can come in two types: literal and figurative. Some planetary bodies are literally erupting. Others are causing figurative eruptions in theories. Here are some recent news stories about planets, moons, comets and other objects circling our sun and other stars. There hasn’t been much news from Mercury or Venus this month, so we’ll start on the home planet and work outward.

Biology

Dinosaur Protein Is Primordial

July 26, 2011

Scientists from 10 universities and institutions have verified that the collagen protein in dinosaur bone is primordial – i.e., from the dinosaur, not from later contamination. By first studying the molecular packing of collagen in living animals, and using X-ray diffraction modeling, they matched the surviving collagen molecules to those that would most likely survive degradation. They feel this establishes the authenticity of the protein fragments against claims of contamination and simultaneously offers a mechanism for its resistance to degradation.

Dating Methods

The Rise and Fall of Submerged Landscapes

July 10, 2011

Under the sea lies a lost land of terrestrial life. On this submerged landscape in the North Atlantic Ocean, river channels and fossils of pollen and coal are now being covered up by the remains of sea creatures. Live Science compared it to the lost continent of Atlantis. How did this fossil terrestrial landscape rise above the water, only to sink again?

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