Find out the reason that helped dinosaurs overcome the cold Jurassic

According to research published in the journal Science Advancesthe coat that helped dinosaurs adapt well during periods of volcanic activity and sharp drops in temperature, quickly colonized areas previously dominated by hairless reptiles.

Previous studies have shown that no glaciers existed on Earth from the late Triassic period (about 230 million to 200 million years ago) to the early Jurassic period, and forests covered the continent thereafter. However, the team of scientists found many iceberg debris in the lake in the Junggar Basin of Xinjiang Autonomous Region, northwest China. The debris originates from the late Triassic and early Jurassic strata. This indicates that there is seasonal freezing occurring at the poles despite the absence of glaciers.

In addition, the researchers also found well-preserved dinosaur footprint fossils in the basin, showing that dinosaurs lived in the polar regions from the late Triassic to the early Jurassic period and adapted to the temperature. seasonal cold.

According to NIGP researcher Sha Jingeng, through analysis, scientists surmise that dinosaurs originally had feathers, not to fly, but possibly to fight the weather.

The team suggests that a volcanic winter (a decrease in global temperature caused by volcanic ash and sulfuric acid droplets that block the sun and increase the reflection of solar radiation), occurs after a major volcanic eruption that led to the extinction of many species in the late Triassic.

The multi-year volcanic winter has destroyed all medium to large-sized, unprotected continental reptiles. Therefore, only feathered dinosaurs can survive.

According to researcher Sha Jingeng, dinosaurs increased rapidly during the Jurassic period, almost doubling. Since then, this creature dominated the continent for about 130 million years.

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