Supernovae are unstable stars. In a very short time, its brightness can suddenly increase by tens of millions to hundreds of millions of times, and at the same time, it releases extremely high energy, which makes the sphere itself explode extremely strongly, and a large number of substances will be dispersed in all directions of space, forming strong radiation.
Supernova explosion is the most violent explosion of all known celestial bodies. Astronomers say that supernovae are not rare astronomical phenomena. In the Milky Way, supernovae explode several times every 200 years. So it is inevitable that the supernova explosion will lead to the extinction of dinosaurs.
All kinds of high-energy radiation produced by supernova explosion can bring direct harm to life on earth. It will destroy reproductive molecules and bones in organisms, leading to a large number of biological deaths.
At the same time, the climate on the earth will also be affected, and various disasters such as drought, waterlogging and disease occur frequently, which has brought disastrous consequences to the survival and development of living things.
The material scattered by supernovae fell to the earth, which changed the composition of surface sediments at that time. In the late 1970s, Adovares discovered that the content of rare element iridium in the clay layer of gubbio at the end of Cretaceous was several times higher than normal. Some people say that this situation may also be caused by a supernova explosion.
At the same time, Xu, a researcher of astronomical geology in China, also found that there were piles of dinosaur egg in the sedimentary rocks at the end of Cretaceous in China. He said that the intense radiation generated by supernova explosion may greatly reduce the reproductive ability of dinosaurs and the hatching rate of dinosaur eggs, and dinosaur eggs can not or rarely hatch small dinosaurs. So dinosaurs will be extinct soon.