Chinese scientists have accurately dated an ancient dinosaur egg to 86 million years ago using a unique method. Credit: Qingmin Chen / CC BY 4.0In a groundbreaking discovery, Chinese scientists have confirmed that an ancient dinosaur egg unearthed in central China is about 86 million years old. Scientists from the Hubei Institute of Geosciences used a dating method never before applied to fossilized dinosaur eggs. For decades, scientists could only guess the age of dinosaur eggs by studying the rock layers around them. Since the 1990s, more than 3,000 fossilized dinosaur eggs have been uncovered there, making it one of the most significant locations for such discoveries.