Science

A double-decker bus during the Great Smog of London, in 1952

When Pollution Blocked Out the Sun

65 years ago on December 5, a deadly smog descended on London. Transportation stopped, people fell into the Thames, and an estimated 12,000 people died. Today, New Delhi has similar problems. How serious is pollution today?
Astronaut Scott Kelly. Photo: Victor Zelentsov / NASA

How a Year in Space Affects the Human Body

Astronaut Scott Kelly spent 340 days in space while his twin brother Mark stayed on Earth. Scientists are comparing the brothers to understand the effects of space on the human body. What have they learned? How do humans fare after a year in space?
Frontline: War on the EPA. Photo: Reuters/Christopher Aluka Berry

Scott Pruitt and the 'War on the EPA'

The director of the Frontline investigation War on the EPA discusses the "role reversal" at the EPA under Scott Pruitt, where "the regulated become the regulator," and the importance of battles over environmental regulation in the election of Donald Trump. 
A rendering of NASA's Cassini above Saturn's northern pole, ready to dive into Saturn's rings. Image: Courtesy NASA

Eight Mind-Expanding Discoveries Made by NASA's Cassini Mission

NASA's Cassini spacecraft has been orbiting Saturn for thirteen years, gathering data about the planet, its many unique moons, and its mysterious rings. Now it is poised to make a final dive into the planet's atmosphere. What have scientists learned from this extraordinary mission?
Jupiter, Saturn, and Neptune in photos taken by the Voyager spacecraft. Photo: NASA/Jet Propulsion Laboratory

One of Humanity's Most Astonishing Achievements

With less computing power than a smartphone, the Voyager spacecraft have traveled more than twenty-two billion miles between them, carrying a Golden Record documenting earth. Launched forty years ago, the Voyager mission is the first human-made object to reach interstellar space.
Composite image of totality showing the corona during the 2015 eclipse in Svalbard with the magnetic field of the sun outlined in the coronal loops. Photo: Jay Pasachoff & Ron Dantowitz

Test Your Solar Eclipse Knowledge

Did you watch the solar eclipse yesterday? Test your knowledge of the 2017 eclipse and general solar eclipse knowledge here, as you bask in the afterglow of the amazing event.
This image from NASA’s Solar Dynamics Observatory shows the moon crossing in front of the sun. Photo: NASA/SDO

Watching the Eclipse Across America

It's been almost four decades since the last one, and another won't happen until 2024: the first total solar eclipse to pass over the lower 48 states since 1979 is a big deal – you don't want to miss it. Find live feeds and other resources from PBS stations across the country.
A solar eclipse.

The Solar Eclipse: Unlike Anything Else in the Sky

On August 21, the first total solar eclipse since 1979 that can be seen in the lower 48 states will cross America. In Chicago, we'll see 87% of the sun covered. The Adler Planetarium shares tips and fun facts about eclipse: "Pictures don't do it justice."
The Amazon River. Photo: SK Films

"The Thrill of Discovery": Henry Walter Bates's 'Amazon Adventure'

The executive producer of a new IMAX film about a naturalist integral to the theory of evolution talks about Bates's contribution and the importance of science education and film's use in it.
A damaged pipe in Flint, Michigan. Photo: Caitlin Saks/WGBH

NOVA: Poisoned Water in Flint

NOVA: Poisoned Water investigates what caused the water crisis in Flint, Michigan. "Our water infrastructure is more fragile and more vulnerable than we realize,” says filmmaker Llewellyn Smith. 
The Museum of Science and Industry's 40-foot tornado. Photo: J.B. Spector/Museum of Science and Industry, Chicago

The 'Wild Weather' of 'Science Storms'

Wednesday, April 26 at 10:00 pm, dive into tornadoes, avalanches, and fire whirls with "Wild Weather." You can explore the same phenomena in a Museum of Science and Industry exhibit - "Not everyone has a four-story tornado."
Drawing of a nuclear reactor based on Chicago Pile-1 from the 1944 patent application by inventors Enrico Fermi and Leo Szilard. (Image courtesy Argonne National Laboratory)

The Atomic Age's Beginnings on a Squash Court in Chicago

75 years ago on December 2, scientists at the University of Chicago inaugurated the nuclear era by engineering the first self-sustaining nuclear chain reaction. Learn about the origins of nuclear power and the upsides and downsides of its future.

The Museum of Science and Industry's Great Train Story exhibit. (Courtesy of J.B. Spector/Museum of Science and Industry, Chicago)

MSI's Train Guy

"The Great Train Story" at the Museum of Science and Industry is a beloved stalwart of the museum. Meet the man who maintains it in advance of a NOVA episode on "Why Trains Crash," airing February 22 at 9:00 pm.
The Regent Seven Seas Explorer. (Courtesy of Martin Gorst)

The Extravagant Features of a Luxury Cruise Ship

Personal butlers, in-suite spas, prints by Chagall and Picasso, hand-blown Murano glass: this is a cruise at its most luxurious.
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