Layered signals beneath Mars are raising new questions.

Beneath the dusty surface of Jezero Crater, instruments aboard Perseverance have been probing deeper than any rover before it. What they are detecting is not random, and it is not easily explained by surface conditions alone. Subsurface reflections are forming shapes that resemble something structured, something repeated. The depth matters, and so does the location at an ancient river delta. Scientists are now trying to determine whether this pattern reflects a familiar process, or something Mars has been hiding for far longer.



