New Research Challenges Existence of Subsurface Lake on Mars

Cornell scientists propose simpler explanation for radar signals initially thought to indicate liquid water beneath Martian ice caps.

Models suggest ice layers could mimic radar reflections attributed to liquid water.
Initial 2018 findings indicated a 20-kilometer-wide lake beneath Mars' south pole.
New simulations show compacted ice layers can produce similar radar echoes.
Researchers emphasize the need for extraordinary evidence for extraordinary claims.
The study casts doubt on the presence of current liquid water on Mars.