Tim Johnson – The Conversation

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June 25, 2026

Why was the early Earth so hot? The heat wasn’t just coming from the inside

Tim Johnson, Curtin University and Craig O'Neill, Queensland University of Technology

Battered by asteroid impacts, the young Earth was hot and unstable for hundreds of millions of years.

Os cones de fragmentação formados pelo impacto em Pilbara: cratera tem idade estimada em cerca de 3,5 bilhões de anos, mais de 1 bilhão de anos mais velha que a anteriormente mais antiga conhecida. Tim Johnson

March 10, 2025

Cientistas encontram a mais antiga cratera de meteorito da Terra na Austrália

Tim Johnson, Curtin University; Chris Kirkland, Curtin University, and Jonas Kaempf, Curtin University

A cratera data de 3,5 bilhões de anos, o que a torna a mais antiga conhecida por uma diferença de mais de um bilhão de anos.

Shatter cones formed by the impact in the Pilbara. Tim Johnson

March 6, 2025

Earth’s oldest impact crater was just found in Australia – exactly where geologists hoped it would be

Tim Johnson, Curtin University; Chris Kirkland, Curtin University, and Jonas Kaempf, Curtin University

The crater dates back 3.5 billion years, making it the oldest known by more than a billion years.

Solarseven / Shutterstock

August 10, 2022

What created the continents? New evidence points to giant asteroids

Tim Johnson, Curtin University

Giant meteorite impacts may have created the land we live on

March 31, 2021

Just add (mantle) water: new research cracks the mystery of how the first continents formed

Chris Kirkland, Curtin University; Hugh Smithies, Curtin University, and Tim Johnson, Curtin University

Evidence from the Pilbara region suggests Earth in its youth behaved very differently to how it does today, and had more water within it than previously thought.

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