Summary:
- The Earth has experienced several ice ages throughout its history, where global temperatures dropped significantly, leading to the expansion of glaciers and ice sheets.
- Scientists believe that the current interglacial period, known as the Holocene, may be the last ice age the Earth experiences due to the impact of human-induced climate change.
- Continued greenhouse gas emissions and global warming could prevent the natural cycle of ice ages from occurring, potentially leading to a permanently warmer climate on Earth.