Chemical compound resembling DNA precursor discovered on Mars

Scientists have discovered a chemical compound on Mars that resembles a precursor to DNA found on Earth. The finding adds to growing evidence that the Red Planet may have once harbored conditions suitable for life. However, researchers say that confirming whether Mars actually hosted microbial life in the past will require bringing Martian samples back to Earth for detailed laboratory analysis. The discovery represents another significant step in the ongoing search for signs of past or present life on Mars, though definitive proof remains elusive without more sophisticated testing capabilities than current Mars missions can provide.