asteroid-impact

A bad day for Younger Dryas comet impact climate theory

Studies refute hypothesis on what caused abrupt climate change thousands of years ago Two new studies in the Journal of Quaternary Science refute the hypothesis that one or more comets/bolides struck North America approximately 12,900 years ago triggering rapid climate change and the start of the Younger Dryas period. Prior to the Younger Dryas, the…

Whitby Abbey in the snow - the shell of the 13th-century church (image for illustration from Pinterest)

Cold Kills: The coldest decade of the millennium

From the EUROPEAN GEOSCIENCES UNION and the “cold kills, so why all the whining about warming?” department. How the cold 1430s led to famine and disease While searching through historical archives to find out more about the 15th-century climate of what is now Belgium, northern France, Luxembourg, and the Netherlands, Chantal Camenisch noticed something odd.…

This is a microscopic image of 2.5 billion-year-old sulfur-oxidizing bacterium.
CREDIT
Andrew Czaja, UC assistant professor of geology

Life before oxygen

From the UNIVERSITY OF CINCINNATI Ancient rocks hold evidence for life before oxygen Somewhere between Earth’s creation and where we are today, scientists have demonstrated that some early life forms existed just fine without any oxygen. While researchers proclaim the first half of our 4.5 billion-year-old planet’s life as an important time for the development and…