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Many Large Lunar Craters Are Less Than One Billion Years Old

For decades, scientists have tried to understand the rate that asteroids hit the Earth by carefully studying impact craters and by using radiometric dating of the rocks around them. Earth has ... read more

Radiometric Dating

Radiometric dating is a process of identifying the age of a material based on known half-lives of decaying radioactive materials found in both organic and inorganic objects. Radiometric dating is ofte... read more

Video: How do we figure out that rocks are billions of years old?

Despite being relatively common, though, we can still learn some amazing things from it. The subject of this description is radiometric dating, which uses radioactive decay of some elements to figure ... read more

How do scientists figure out Earth’s age?

In the early part of the 20th century, scientists still weren’t sure how old Earth is. Nowadays, scientists use radiometric dating of various sorts of rock – both earthly and extraterrestrial – to pin... read more

New evidence places humans in America 130,000 years ago

However, at the time of the discovery dating methods were insufficiently precise to indicate the age of the remains. Revisiting the finds, Holen and his team used a type of radiometric dating that rel... read more

How do geologists date rocks? Radiometric dating!

Explanation of how geologists date rocks (to determine the ages of the Earth, fossils, mineral deposits, and other geologic events) and processes using radiometric dating techniques based on radioacti... read more

Asteroid Impacts Increased 290 Million Years Ago, Lunar Craters Reveal

On Earth, crater ages can be determined thanks to radiometric dating of the rocks around them. But only two lunar craters have been dated using this method, thanks to samples returned by the Apollo mi... read more

Asteroid Impacts On Earth Are Increasing, But Scientists Are Not Sure Why

For decades, scientists have been trying to determine how often asteroid impacts occur with the use of radiometric dating on the rocks around the craters to calculate their ages. However, due to the i... read more

Earth hit by more asteroids in past 290 million years

Before now, researchers used Earth’s craters in their studies and radiometric dating of the rocks, but many assumed early craters were worn away by erosion and other processes over time. “It became cl... read more

Principles of Radiometric Dating

Currently unavailable to order online. The time-dependent decay of naturally occurring radioactive isotopes or in-growth of their radioactive or stable daughter products form the basis of radiometric ... read more