E6 • Did Earth Have Two Moons?

E1 • Pluto's Stranger Things

Astronomers find evidence for alien technology around a distant star.

44m • 2016

Astronomers find evidence for alien technology around a distant star.

E2 • Rise of the Planet Killer

A mission to Mars captures an image of a strange structure on the planet.

44m • 2016

A mission to Mars captures an image of a strange structure on the planet.

E3 • A President's Close Encounter

Geysers are discovered on a frozen moon, and NASA detects evidence of life.

44m • 2016

Geysers are discovered on a frozen moon, and NASA detects evidence of life.

E4 • The Earth Next Door

Astronomers detect a potentially habitable planet close to Earth.

44m • 2016

Astronomers detect a potentially habitable planet close to Earth.

E5 • Curse of the Full Moon

A strange phenomenon impacts a NASA experiment during a full moon.

44m • 2016

A strange phenomenon impacts a NASA experiment during a full moon.

E6 • Did Earth Have Two Moons?

Scientists investigate an ancient claim that the earth had two moons.

44m • 2016

Scientists investigate an ancient claim that the earth had two moons.

E7 • Mysterious Invisible Planet

Astronomers discover evidence of an invisible planet orbiting a star.

44m • 2016

Astronomers discover evidence of an invisible planet orbiting a star.

E8 • Mars's Deepest Secret

The Mars Orbiter captures an image of odd streaks on the Martian surface.

44m • 2016

The Mars Orbiter captures an image of odd streaks on the Martian surface.