1984 A 65-million-year-old dinosaur egg nest fossil was unearthed in China. After several twists and turns, this "dinosaur egg nest" fossil has been lost to China. This "dinosaur egg nest" fossil contains 22 eggs, of which 19 eggs can find embryonic dinosaur embryos.

In 2003, an American collector bought it at an American public auction for $420,000 and returned it to China free of charge after many negotiations. This is also the first time that China has pursued the ancient fossils lost overseas through channels.

Extended data:

The appearance of dinosaur eggs has the following characteristics:

1, eggshell, eggshell thickness is about 0.4-0.6 mm, rarely more than 1 mm, observed with a magnifying glass, we can see that there are finely arranged calcite crystals on the cross section of eggshell, eggshell is often incomplete and easy to fall off, and eggs without eggshell are worthless.

2. The rocks inside and outside the eggshell are muddy, the inside of the eggshell is gray, and the outside of the eggshell is khaki, which is washed with a hard brush to form precipitation slurry.

3. If it is a hard rock, you can't see the eggshell, and it is mostly tuberculosis rather than dinosaur eggs. The eggs publicly put out for sale in the Beijing market are all tuberculosis, but there are real goods. According to the appearance and the integrity of the eggshell, each egg is probably between 300 yuan and 500 yuan, and the wax gourd-shaped egg is more expensive.

Baidu encyclopedia-dinosaur egg