Grunsfeld added that the brine streaks aren't the most likely place on Mars to find life - better conditions for microbes would likely be underground, near a source of fresh water, rather than salty water.
An Australia ETA (Electronic Travel Authority) is a visa for travel to Australia that is issued electronically. An Australia ETA is typically valid for one year, and allows for multiple visits to Australia for a stay of up to 90 days per visit for tourist or for business travelers.
Exceptions include U.S. citizens and travellers with a valid Canadian visa. Canadian citizens, including dual citizens, and Canadian permanent residents cannot apply for an eTA. The leniency period that allows travellers to board their flight without an eTA ends soon.