What is Monomineralic Rock?

Granite.

What is Polymineralic Rock?

Black Quartz Cluster

What is Black Quartz?

Illustration of Massospondylus eggs and young dinosaurs

What the world’s oldest eggs reveal about dinosaur evolution

Over the last 540 million years, as the Earth's tectonic plates have shifted, MIT researchers have found that periods of major tectonic activity (orange lines) in the tropics (green belt) were likely triggers for ice ages during those same periods.

Tectonics in the tropics trigger Earth’s ice ages

Lava flow, Kilauea eruption, 2018. Drone image from Einat Lev

On the front lines in Kilauea

Dyke cutting Canary Islands, Spain

Dyke cutting Canary Islands, Spain

Joseph Peterson, a vertebrate paleontologist at the University of Wisconsin Oshkosh, demonstrates how a T. rex takes a bite.

Teenage T. rex was already chomping on prey

Earth's layers

Scientists go to extremes to reveal make-up of Earth’s core

Researchers conducting fieldwork in Namibia as part of a previous study.

Ancient records prompt rethink of animal evolution timeline

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