New proof microbes performed a job in mysterious markings on Mars

Scientists are narrowing down explanations for a possible chemical signal of historical life on Mars. This signal – marks discovered on Martian rocks final 12 months – might have been brought on by microbes or by a response that takes place solely at excessive temperatures. New findings counsel the organic clarification is extra probably.

Final 12 months, whereas exploring an historical lakebed referred to as Brilliant Angel in Mars’s Jezero crater, NASA’s Perseverance rover found a rock with uncommon markings – referred to as “leopard…