1) climate change
2)pollution
3)invasive
4)overexplotution
5) deforestation and habit loss
Radioactive isotopes got scattered in the experiment which contained radion, however, the bacteria didn't have a high amount of radiation. You even eat radiation every day. For Example, a banana has approximately 1/1,000,000 sieverts. in order for that radiation to kill you, you would need the radiation of 2 sieverts, or 2 trillion bananas.
Answer:
Because the earth's axis is tilted. It is all about the tilt of the Earth axis.
Explanation:
Ice age. It caused saber tooth and mammoth to die