Trump wants to put humans on Mars: what scientists think of the plan

In this Podcast Extra, we examine President Donald Trump's calls for NASA to land humans on Mars. Although the White House has proposed spending some US$1 billion in 2026 on Mars plans, critics say the final cost will likely be hundreds of billions of dollars spread over a number of years.

This call comes amidst plans to drastically reduce NASA's funding, and the proposed cancelling of dozens of the space agency's missions, including projects to study Earth, Mars and Venus.

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