Female (top) and male (below) of the ostracod Cypideis salebrosa.
Fossils

Scientists Understand the Role of Sexual Selection in Extinction

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Teeth from the Gadoufaoua deposit (Niger). The scale bar represents 2 cm. From left to right: teeth of a giant crocodile, Sarcosuchus imperator, a spinosaurid, a non-spinosaurid theropod (abelisaurid or carcharodontosaurid), a pterosaur, a hadrosaurid (a herbivorous dinosaur), a pycnodont (fish), and a small crocodylomorph.
Dinosaur

The dinosaur menu, as revealed by calcium

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Shonisaurus
Fossils

Giant ichthyosaur is one of largest animals ever

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Meteorites
Earth

Water appeared while Earth was still growing

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Earth

Brewing up Earth’s earliest life

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plate tectonics

Geologist identifies hidden clues to ancient supercontinents, confirms Pannotia

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The Nazca Plate is creeping under the South American Plate.
Earthquake

Water pressure a critical factor for mega-earthquakes

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Victoria Falls, Africa.
Volcanoes

Great magma erup­tions had two sources

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Ichthyosaur
Fossils

Prehistoric reptile pregnant with octuplets

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The Pinnacles of Gunung Mulu in Borneo
Atmosphere

New source of global nitrogen discovered

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