NASA to report "significant" Mars discovery today at 2 p.m. EST

"Significant findings from NASA's Mars Exploration Rover Opportunity, now exploring Meridiani Planum on Mars, will be announced at a press briefing at 2 p.m. EST, Tuesday, March 2, 2004, at NASA Headquarters, Washington." Link (Thanks, Kevin!)

News reports say it'll be evidence that Mars was once a "wet and warm planet, capable of sustaining microscopic life."