Australia witnesses rare green fireball meteor explosion.
A rare green meteor, known as a bolide, exploded over Australia, creating a bright flash of light and a loud bang that could be seen and heard for hundreds of miles. The meteor was likely small, between 1.6 and 3.2 feet across, and could have been traveling up to 93,000 mph. Bolides are meteors that blow up in Earth's atmosphere due to a buildup of friction that eventually causes the space rocks to instantaneously shatter with enough force to trigger a sonic boom. The unusual green flash of the meteor was caused by a high concentration of metals such as iron and nickel in the meteor.