Why does a widely used internet search engine deliver results that can be blatantly racist and sexist? Two leading information researchers investigate their discoveries of hidden biases in the search technology we rely on every day.

The Big Bang is when the cosmos started and time itself began. With stunning animation based on space telescope images, NOVA winds back the ages to discover new clues about this ultimate genesis and what happened in the universe’s first few seconds.

Take a seat on the ultimate thrill ride to explore nature’s strangest and most powerful objects. Discover new science showing how black holes reshape entire galaxies, warp the fabric of space and time, and might even be portals to another universe.

Ultra-sensitive telescopes have transformed alien planet-hunting from science fiction into enthralling hard fact. Join NOVA on a visit to exotic worlds orbiting distant suns to answer an age-old question with thrilling new science: are we alone?

Straddling the night sky, the Milky Way reminds us of our place in the galaxy we call home. But what shaped this giant spiral of stars and what will be its destiny? NOVA travels back in time to unlock the turbulent story of our cosmic neighborhood.

Join scientists on the biggest Arctic research expedition of all time. Facing hungry polar bears, perilous sea ice cracks, and brutal cold, the team strives to understand the forces that are changing the region—and the world—forever.

Outnumbering atoms a billion to one, neutrinos are the universe’s most common yet most elusive and baffling particle. NOVA joins an international team of neutrino hunters whose discoveries may change our understanding of how the universe works.

As state-legalized cannabis spreads, NOVA investigates the latest scientific evidence for its potential benefits and risks, and how criminalization has disproportionately harmed communities of color.

Bats have been implicated in deadly epidemics such as COVID-19 and Ebola, yet scientists are discovering evidence that they may hold a key to a longer and healthier life. From caves in Thailand and Texas to labs around the globe, NOVA meets the scientists who are decoding the superpowers of the bat.

The Age of Exploration and Europe’s imperial colonization of far-off lands was launched by a revolution in ship design that made long-distance voyages practical. A newly discovered 500-year-old wreck offers vital clues to this momentous innovation.

Can new emission-free electric planes replace our polluting airliners and revolutionize personal transportation in our cities? NOVA takes a ride in some quiet, energy-efficient, prototypes that are vying for success as electric flight takes off.

80 years after the world’s largest airship ignited in a giant fireball, newly discovered footage sparks a reinvestigation of what exactly caused the Hindenburg disaster.

What causes infertility, and how can assisted reproductive technologies help? Follow the journeys of people navigating fertility challenges from structural inequalities and racism to falling sperm counts, egg freezing, and IVF.

If oceans continue to warm at the current pace, coral reefs could be wiped out by the end of the century. But scientists from around the globe are rushing to help corals adapt to a changing climate through assisted evolution.

Women make up less than a quarter of STEM professionals in the United States, and numbers are even lower for women of color. But a growing group of researchers is exposing longstanding discrimination and making science more inclusive.

NASA launches its most ambitious hunt for traces of life on Mars, landing a car-sized rover in a rocky, ancient river delta. The rover will stow samples for possible return to Earth and test technology that may pave the way for human travel to Mars.

Some 30 million Americans have sent their DNA to be analyzed by companies like 23andMe and AncestryDNA. But what happens once the sample is in the hands of testing companies, and how accurate are their results? NOVA explores the power of genetic data to reveal family connections, ancestry, and health risks—and even solve criminal cold cases.