Physical Sciences

Complex multicellular life discovered from before Cambrian explosion

Stromatolites dated to the Middle Cambrian Era

With the help of a team from the Chinese Academy of Sciences, Virginia Tech geobiologist Shuhai Xiao discovered fossils of some of the earliest known complex multicellular eukaryotes. The multicellular organisms found in the fossils from that time period, 600 million years ago, are more complex than expected (1). The...

 
 

Satellite Detects Local Dips in Gravity Due to Ice Melting

Gravity maps of Antarctica and surrounding ocean have been improved thanks to higher resolution satellite measurements.

Data from the European Space Agency’s (ESA) Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) satellite has shown that the ice lost from West Antarctica has caused changes in the Earth’s gravity field. The GOCE satellite measured the Earth’s gravity over the span of four years to better understand the...

 
 

First Potentially Habitable Earth-sized Planet Confirmed

Image Courtesy of NASA Ames/SETI Institute/JPL-Caltech
Source: http://commons.wikimedia.org/wiki/File:Kepler186f-ComparisonGraphic-20140417.jpg

Researchers at the Keck Observatory and the Gemini Observatory have discovered a planet that could very much resemble our own. Every star has a zone on its orbit in which water may exist in liquid form. This is deemed the “habitable zone” because it is thought that life cannot thrive...

 
 

Voyager 1 Reaches Interstellar Space

Don Gurnett, on the left, during his talk at the Dartmouth physics colloquium. Photo: Merritt Losert '17

On Friday, April 4, Don Gurnett, a professor of physics and astronomy at the University of Iowa, gave a talk about the history and science of the Voyager missions. The Voyager probes have been two of the most important ever launched. They explored the far reaches of the solar system,...

 
 

The Chelyabinsk Asteroid

The Chelyabinsk Asteroid

This February, the largest asteroid since 1908 impacted the planet’s surface near the city of Chelyabinsk in the Urals region of Russia (Figure 1). In an article published in Nature, Quirin Schiermeier reported that the asteroid shone 30 times brighter than the Sun and moved through the Earth’s upper atmosphere...

 
 
 
 
 

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Founded in 1998, the Dartmouth Undergraduate Journal of Science aims to increase scientific awareness within the Dartmouth community by providing an interdisciplinary forum for sharing undergraduate research and enriching scientific knowledge.

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