An interstellar cloud may have caused an ice age on Earth. Here’s how – Space.com

1. An interstellar cloud may have caused an ice age on Earth. Here’s how  Space.com
2. A possible direct exposure of the Earth to the cold dense interstellar medium 2–3 Myr ago  Nature.com
3. The Solar System May Have Passed through Dense Interstellar Clouds 2 Million Years Ago, Altering Earth’s Climate  Boston University
4. Humans emerged thanks to Earth colliding with cold clouds, study suggests  The Telegraph
5. Solar System Passed Through Cold Interstellar Cloud About 2 Million Years Ago, Study Suggests  Sci.News