NASA’s Curiosity rover has found the longest chain carbon molecules yet on Mars

NASA’s Curiosity Mars rover has detected the largest organic (carbon-containing) molecules ever found on the red planet. The discovery is one of the most significant findings in the search for evidence of past life on Mars. This is because, on Earth at least, relatively complex, long-chain carbon molecules are involved in biology. These molecules could actually be fragments of fatty acids, which are found in, for example, the membranes surrounding biological cells. Scientists think that, if life ever emerged on Mars, it was probably microbial in nature. Because microbes are so small, it’s difficult to be definitive about any potential evidence for life found on Mars. Such evidence needs more powerful scientific instruments that are too large to be put on a rover. The organic molecules found by Curiosity consist of carbon atoms linked in long chains, with other elements bonded to them, like hydrogen and oxygen. They come from a 3.7-billion-year-old rock dubbed Cumberland, encountered by the rover at a presumed dried-up lakebed in Mars’s Gale Crater. Scientists used the Sample Analysis at Mars (SAM) instrument on the NASA rover to make their discovery. Read full article Comments

Ex-FCC chairs from both parties say CBS news distortion investigation is bogus

The Federal Communications Commission’s news distortion investigation into CBS drew a public rebuke from a bipartisan group of five former FCC commissioners, including two former chairmen. The group criticizing current Chairman Brendan Carr includes Republican Alfred Sikes, the FCC chair from 1989 to 1993, and Democrat Tom Wheeler, the FCC chair from 2013 to 2017. They were joined by Republican Rachelle Chong, Democrat Ervin Duggan, and Democrat Gloria Tristani, all former commissioners. “These comments are submitted to emphasize the unprecedented nature of this news distortion proceeding, and to express our strong concern that the Federal Communications Commission may be seeking to censor the news media in a manner antithetical to the First Amendment,” the former chairs and commissioners told the FCC in a filing this week. Read full article Comments