S4 E1 • Asteroid Belt Discovery

New evidence from NASA's Dawn mission to Ceres, a dwarf planet the size of Texas, is changing our understanding of not only the Asteroid Belt but may also may hold the key to deciphering the early life of our solar system.

S4 E2 • Building The Sun The 250 Million Degree Problem

Scientists investigate the way the Sun builds its power -- through fusion -- hoping to find a way to use fusion as a less dangerous and less radioactive waste-producing path to energy than fission. But there are some major difficulties along the way

S4 E3 • Mars InSight Seven Minutes to Touchdown

The fate of the Mars InSight lander will all come down to a fiery seven-minute freefall into the Red Planet. Will it survive and reveal new insight into our planetary neighbor, or will the atmosphere of Mars prove to be too much for our new planetary explorer?

S4 E4 • Miami Beach Underwater

As scientific studies confirm sea level changes throughout the globe, major coastal cities like Miami are now fighting back against these rising tides, before it's too late. Parts of Miami Beach are under serious threat, with major economic and social dangers looming large.

S4 E5 • Reversing Alzheimers

As the number of people affected by Alzheimer's Disease continues to grow at an unprecedented pace, researchers worldwide are racing to discover a cure. While stopping the disease is the ultimate goal, could a team in the UK have cracked a method to reverse Alzheimer's Disease?

S4 E6 • Floodgates of Venice

MOSE is one of the world’s largest and highest-profile civil-engineering works. But will it be able to save Venice? Venice has grappled with inundation for centuries. But due to natural subsidence and higher tides caused by global warming, the city is more vulnerable to flooding than ever before.

S4 E7 • New Horizons: The Kuiper Belt Target

The New Horizons spacecraft revolutionized our understanding of the solar system as it rocketed past Pluto. Now, four billion miles since its launch, the craft approaches its next target, Ultima Thule.

S4 E8 • Direct From An Asteroid

The Hayabusa2 spacecraft has just completed one of the most intricate procedures in space exploration. The first mission to deliver rovers onto an asteroid has now descended to its surface for a sample, before returning back to Earth in 2020.