NASA published tantalizing evidence that the red planet once harbored life. But Trump’s proposed budget could leave the mystery unsolved.

Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.

An exciting discovery on Mars is being overshadowed by turmoil at NASA, with budget cuts threatening to destroy a scientific legacy that has been built over decades. Yesterday, the agency shared a finding, published in Nature, of potential biosignatures identified by the Mars Perseverance rover in a 3.5 billion-year-old rock.

While the early climate of Mars remains an open question, a new study suggests that its atmosphere may have been hospitable to life due to volcanic activity that emitted sulfur gases that contributed to a greenhouse warming effect.