An Alternative to Dark Matter?

The video explores the concept of dark matter, its role in galaxies, and the challenges to its existence. A new model proposes an alternative explanation for cosmic phenomena without dark matter. Additionally, the video discusses the effects of space travel on human health, focusing on mitochondrial DNA and potential health risks for astronauts.

What is dark matter and how is it observed?

What evidence do astronomers have for the existence of dark matter?

What are the alternative hypotheses regarding dark matter?

How did the new model proposed by researchers replicate the cosmic microwave background (CMB)?

What effects does space travel have on astronauts' health according to the recent research?

What role does mitochondrial DNA (Mt DNA) play in monitoring astronauts' health?

What were the findings regarding the leakage of Mt DNA in astronauts after their missions?