Earth’s Oxygen Increased in Gradual Steps Rather Than Big Bursts

Astrobiology article synopsis below. Full story at: https://www.astrobio.net/biosphere/earths-oxygen-increased-in-gradual-steps-rather-than-big-bursts/   A carbon isotope anomaly found in the Hüttenberg formation of sedimentary rocks in north-eastern Namibia follows a pattern similar to that seen during the Great Oxygenation Event, hinting at new evidence for how Earth’s atmosphere became fully oxygenated. The study, published in the journal Precambrian Research, … More Earth’s Oxygen Increased in Gradual Steps Rather Than Big Bursts

The Lion King: Rarely Seen Mountain Lions Rule over West Texas’ Rocky Ranges

Originally published in the March 2018 issue of Texas Parks & Wildlife magazine   With the widest distribution of any wild cat from Canada to South America, it’s surprising how little we know about mountain lions in Texas. What we do know comes largely from western states, where the cat is commonly classified as a … More The Lion King: Rarely Seen Mountain Lions Rule over West Texas’ Rocky Ranges

Pond Scum Explains Evolution Of First Animals

[This article was published in NASA-sponsored Astrobiology Magazine in Jan. 2018.  https://www.astrobio.net/origin-and-evolution-of-life/pond-scum-explains-evolution-first-animals/] Earliest animals evolved on seafloor microbial mats By Emily Moskal   When Charles Darwin wrote On the Origin of Species and for decades thereafter, scientists ascribed the beginning of animal life to the Cambrian, eventually pinned to about 540 million years ago when … More Pond Scum Explains Evolution Of First Animals