The discovery of a massive crater formed by the impact of a meteorite more than 3.5 billion years ago is changing the way ...

By studying other ancient craters, scientists hope to better understand how life may have emerged and developed on Earth. To go further: What is a shock cone? Shock cones are cone-shaped rock ...

Towering hoodoos—cone-shaped spires reaching up to 90 feet tall—rise from the earth, sculpted from layers of ash, pumice, and tuff. Kasha-Katuwe Tent Rocks National Monument, whose name ...