Rock-solid archives record variations in the Earth's orbit

The shape of Earth's orbit around the sun and the orientation of its axis undergo regular variations over periods of thousands to millions of years. These variations—known as Milankovitch cycles after the Serbian geophysicist ...

Study sheds light on Neanderthal-Homo sapiens transition

Archaeologists at The Australian National University (ANU) and the University of Sydney have provided a window into one of the most exciting periods in human history - the transition between Neanderthals and modern humans.

Sea level as a metronome of Earth's history

Sedimentary layers contain stratigraphic cycles and patterns that precisely reveal the succession of climatic and tectonic conditions that have occurred over millennia, thereby enhancing our ability to understand and predict ...

Image: Layers and fractures in Ophir Chasma, Mars

Ophir Chasma forms the northern portion of the vast Mars canyon system Valles Marineris, and this image, acquired on Aug. 10, 2015, by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance ...

Orbiter views Mars surface fractures

The High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter often takes images of Martian sand dunes to study the mobile soils. These images provide information about erosion and ...

Secrets of dolerite sills

The exploitation of mineral deposits always creates debates around economic necessity versus environmental preservation. Fracking for gas in the Karoo region of South Africa is currently vigorously debated. This article is ...

How cosmic crashes could have kickstarted plate tectonics

A rock the size of a small city hurtles towards Earth, smashing a crater bigger than the span between Washington, D.C. and New York City. The heat and shockwave raises the temperature of the atmosphere above boiling as huge ...

Unearthing the history of the Naracoorte Caves

(Phys.org) —Flinders University researcher Amy Macken has discovered the age of sedimentary layers in the Naracoorte Caves using a cutting-edge computer modelling technique that has never before been used on an Australian ...

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