(Image credit: NASA/JPL-Caltech) It appears that China has moved up its agenda for bringing Mars samples to Earth, and aims to do so before the U.S. achieves this same goal. NASA's Mars sample return plan, a joint effort with the European Space Agency (ESA), continues to be scrut...
Such agreement is expected since the seasonal cycle of XCH4 has previously been shown to have strong zonal features (Supplementary Fig. 2; ref. 3). These two pieces of evidence strongly suggest that the local variability in XCH4 has a much larger footprint than the underlying local region. ...