<a href="https://en.wikipedia.org/wiki/NASA" id="mwASA" rel="mw:WikiLink" title="NASA">NASA</a> reveals photographs taken by <a href="https://en.wikipedia.org/wiki/Mars_Global_Surveyor" id="mwASE" rel="mw:WikiLink" title="Mars Global Surveyor">Mars Global Surveyor</a> suggesting the presence of liquid <a href="https://en.wikipedia.org/wiki/Water_on_Mars" id="mwASI" rel="mw:WikiLink" title="Water on Mars">water on Mars</a>.