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Seabird Bones Reveal Changes in Open-Ocean Food Chain
May 13, 2013 — Remains of endangered Hawaiian petrels -- both ancient and modern -- show how drastically today's open seas fish menu has changed. Scientists analyzed the bones of Hawaiian petrels -- birds that ... > full story -
Carbon Dioxide at NOAA's Mauna Loa Observatory Reaches New Milestone: Tops 400 Parts Per Million
May 10, 2013 — On May 9, the daily mean concentration of carbon dioxide in the atmosphere of Mauna Loa, Hawaii, surpassed 400 parts per million (ppm) for the first time since measurements began in 1958. Independent ... > full story -
Earliest Archaeological Evidence of Human Ancestors Hunting and Scavenging
May 10, 2013 — A recent research study has shed new light on the diet and food acquisition strategies of some the earliest human ancestors in Africa. Beginning around two million years ago, early stone tool-making ... > full story -
Ice-Free Arctic May Be in Our Future, International Researchers Say
May 9, 2013 — Analyses of the longest continental sediment core ever collected in the Arctic provide "absolutely new knowledge" of Arctic climate from 2.2 to 3.6 million years ago. The research has major ... > full story -
Elevated Cadmium Levels Linked to Disease: Men Especially Affected
May 9, 2013 — People with higher levels of cadmium in their urine -- evidence of chronic exposure to the heavy metal found in industrial emissions and tobacco smoke -- appear to be nearly 3.5 times more likely to ... > full story -
Geologists Study Mystery of 'Eternal Flames'
May 9, 2013 — "Eternal flames" fueled by hydrocarbon gas could shine a light on the presence of natural gas in underground rock layers and conditions that let it seep to the surface, according to new ... > full story -
Four New Dinosaur Species Identified
May 8, 2013 — Just when dinosaur researchers thought they had a thorough knowledge of ankylosaurs, a family of squat, armor-plated, plant-eaters, along comes a graduate student with some other ... > full story -
Dietary Flexibility May Have Helped Some Large Predators Survive After Last Ice Age
May 8, 2013 — During the late Pleistocene, a diverse assemblage of large-bodied mammals inhabited the "mammoth steppe" of northern Eurasia and Beringia. Of the large predators -- wolves, bears, and big cats -- ... > full story -
First Biological Evidence of a Supernova
May 8, 2013 — In fossil remnants of bacteria, researchers have found a radioactive iron isotope that they trace back to a supernova in our cosmic neighborhood. This is the first proven biological signature of a ... > full story -
Oldest? New 'Bone-Head' Dinosaur Hints at Higher Diversity of Small Dinosaurs
May 7, 2013 — Scientists have named a new species of bone-headed dinosaur (pachycephalosaur) from Alberta, Canada. The plant-eating Acrotholus audeti was approximately six feet long and weighed about 40 kgs in ... > full story
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