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Shi En Kim

Shi En Kim

Shi En Kim is a Washington, D.C.-based freelance science journalist. Her work has appeared in National Geographic, Scientific American, the Atlantic, Popular Science and others. In 2021, she interned at Smithsonian magazine as an AAAS Mass Media Fellow.

Stories from this author

Smithsonian magazine's picks for the best books about science in 2025 include Replaceable You, Dinner With King Tut and North to the Future.

The Ten Best Science Books of 2025

From “experimental archaeology” to the mysterious appeal of exploration, the wide-ranging subjects detailed in these titles captivated Smithsonian magazine’s science contributors this year

An artist’s impression of ten hot planets similar to Jupiter outside our solar system that scientists have detected. Creative liberties were taken for the colors of the planets, which are currently unknown. The exception is the top-right one, which is known to sport a blue exterior.

From Worlds That Look Like Cotton Candy to Others Covered in Volcanoes, These Are the Strangest and Most Captivating Exoplanets

Scientists are using an array of instruments to detect other planets, some of which may harbor life—and others that most definitely don’t

Don’t let the placid and bland surface fool you—Uranus is a singularly dynamic planet.

The Six Most Amazing Discoveries We’ve Made by Exploring Uranus

Its bland exterior belies a dynamic world full of surprises

Paleontologists and volunteers excavate dinosaur trackways in Oxfordshire, England, uncovering the biggest find of its kind in the United Kingdom.

A Quarry Worker Felt Strange Bumps While Digging. They Turned Out to Be the Largest Dinosaur Trackway in the U.K.

The five sets of tracks represent four-legged sauropods and a three-toed carnivore that might have crossed paths on a prehistoric landscape

More than 1,300 tiny snails were released into the wild after a captive breeding effort. One baby snail is shown here on a British five pence coin.

Once Feared Extinct, 1,329 Pea-Sized Snails Have Been Released on an Atlantic Island After Captive Breeding Effort

Goats, rodents and habitat loss threatened the snails on Deserta Grande Island, so the mollusks were reintroduced on a neighboring island that’s free of invasive species

Researchers calculated that the human brain processes thought at a speed of ten bits per second.

The Speed of Human Thought Is Far Slower Than the Average Wi-Fi, Study Suggests

But the rate that we gather sensory data is 100 million times faster than our thought processes, making our brains champions at filtering information from our chaotic surroundings

An illustration of the Parker Solar Probe approaching the sun

A NASA Spacecraft Will ‘Touch’ the Sun on Christmas Eve, Flying Closer to the Star Than Any Probe Before

The Parker Solar Probe will endure scorching temperatures of 1,700 degrees Fahrenheit as it performs the closest solar flyby of any human-made object in history

The invasive northern giant hornet, also called a murder hornet, has been eradicated from the United States.

Officials Declare the U.S. Free of ‘Murder Hornets’ in a Rare Victory Against an Invasive Insect

Five years after the first sighting in Washington state, intense efforts have eradicated the bee-killing hornets from the nation

New research suggests early humans hunted and ate mammoths, as well as elk and bison, to a lower degree.

An Ice Age Infant’s Bones Reveal Early Americans Ate Woolly Mammoths as a Protein Staple

New research examines chemical signatures to determine the diet of a prehistoric boy and his mother, suggesting the Clovis people relied on mammoths for a large portion of their menu

The Stegosaurus named Apex is on display at the American Museum of Natural History in New York City.

You Can Now See Apex, the World’s Most Expensive Dinosaur Fossil, on Display at a New York City Museum

The largest and most complete Stegosaurus specimen sold for a record-setting price in July, and it is currently on loan to the American Museum of Natural History for four years

Smithsonian magazine’s top science titles this year.

The Ten Best Science Books of 2024

From a deep dive on a fatal space shuttle disaster to a study of a dozen iconic trees, these are our favorite titles this year

A photo of Neptune, taken by the Voyager 2 probe, with the colors rebalanced to represent its truest appearance

The Six Most Amazing Discoveries We’ve Made About Neptune

Despite the lack of a dedicated mission to the planet, scientists have learned plenty through ground observations and space telescopes

The crowning glory of the Gardenia brighamii is its pearly flower.

Can Fungi Save This Endangered Hawaiian Tree?

By inoculating greenhouse na’u seedlings with mycorrhizal fungi, researchers hope to boost survival odds when the plants are returned to the wild

A color-enhanced photo of Pluto that was captured by the New Horizons spacecraft in 2015

The Seven Most Amazing Discoveries We’ve Made About Pluto

Though technically not a planet, it has as rich geology as any of its planetary siblings in the solar system

Annual mammograms are recommended for women in their 40s and above, but new research suggests younger adults are increasingly at risk for breast cancer.

Breast Cancer Cases Are Rising Among Younger Women, Report Finds

Though breast cancer mortality is declining overall, Asian American women and women under 50 have experienced an uptick in diagnoses of the disease

Gears turn inside an antique watch.

World’s First Ultra-Precise Nuclear Clock Is Within Reach After Major Breakthrough, Researchers Say

The technology, enabled by thorium atoms, could keep time more accurately than atomic clocks and enable new discoveries about gravity, gravitational waves and dark matter

An illustration of an asteroid and the moon orbiting Earth.

Earth Is Getting a New ‘Mini Moon’ for the Next Two Months, Astronomers Say

A roughly 33-foot-long asteroid called 2024 PT5 will chart a horseshoe-like path around our planet

An artist’s illustration of the Porphyrion jet pair escaping a black hole and passing through voids in the cosmic web.

Astronomers Discover Record-Breaking Jets Escaping a Black Hole, the Longest Ever Seen

The energetic streams are together 23 million light-years in length—roughly as long as 140 Milky Way galaxies lined end to end

Saturn, the second-largest planet in our solar system, is best known for its layered rings.

The Seven Most Interesting Discoveries We’ve Made by Exploring Saturn

Scientists continue to learn new things about the planet, its sweeping rings and its many moons

Jupiter's moon Ganymede is the largest moon in the solar system and is even wider than the planet Mercury.

An Ancient Asteroid Smashed Into Jupiter’s Moon Ganymede and Tipped It Over, Study Finds

The cataclysmic impactor was 20 times the size of the rock that wiped out the dinosaurs on Earth

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