PROLinda Tanner/Flickr (CC BY-NC-ND 2.0)

From Texas Standard.

Long before David Bowie ever posed the musical question, mankind has been asking, “Is there life on Mars?” After decades of research, including the unmanned Viking missions, rovers and landers, scientists still aren’t sure.

Scientists have caught Mars crying salty tears.

Photos from NASA's Mars Reconnaissance Orbiter show dark streaks flowing down Martian slopes. The streaks appear in sunny spots or when the weather is warm, and they fade when the temperature drops.

WATCH: NASA's Mysterious Mars Announcement

Sep 28, 2015

Today, NASA will announce a "major science finding" from the space agency's exploration of Mars. While some suggest the press conference will finally answer David Bowie's query as to whether there's life on the Red Planet, many believe the press conference will confirm the discovery of water on the planet. NASA has been decidedly cryptic about the announcement.

Whatever the case may be, check out the livestream of NASA's announcement below:

The best place to stand in the entire solar system at 1:14 a.m. ET Monday was about 150 million miles away, at the bottom of Gale Crater near the equator of the Red Planet.

Looking west around mid-afternoon local time, a Martian bystander would have seen a rocket-powered alien spacecraft approach and then hover about 60 feet over the rock-strewn plain between the crater walls and the towering slopes of nearby Mount Sharp.