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Sara Hashemi

Sara Hashemi

Sara Hashemi is a science writer and fact-checker currently based in New York City. Her work has appeared in Sierra, The Body, Maisonneuve magazine and more. 

Stories from this author

The study focused on brain cell activity in a structure called the hippocampus, which is important for memory and learning.

Is the Unconscious Mind Aware of Its Surroundings? New Research Suggests Anesthetized Brains Can Process Overheard Words

Seven participants had electrodes temporarily implanted in a brain structure important for learning. While anesthetized, their nerve cells learned to differentiate between distinct sounds—and could even predict upcoming words in phrases

The Bering Strait is a narrow waterway between Russia and Alaska that connects the Pacific and Arctic oceans.

Could Building a Dam Across the Bering Strait Save the Planet From Some Effects of Climate Change?

A preliminary study suggests that blocking off the waterway between Russia and Alaska could help the survival of a key system of ocean currents. But there could be potential unforeseen consequences, particularly to marine ecosystems

Scientists used acidic and basic solutions to trigger chemical reactions in algae.

These Marine Algae Glow When Waves Disturb Them. Their Bioluminescence Could Power Electricity-Free Lamps of the Future

The single-celled organisms usually shimmer for mere milliseconds, but researchers figured out how to sustain their illumination. The technology could one day be used to light robots’ ways in the deep sea or space

Microplastics are particles smaller than five millimeters in length, or narrower than a pencil-tip eraser. 

Microplastics Are Swirling Around in the Atmosphere, Where They Might Be Contributing to Climate Change

Airborne plastic particles, particularly colorful ones, absorb more sunlight than they reflect, which can heat the surrounding air, according to a new study

Researchers studied social learning in the birds by introducing a novel food item: colorfully dyed almonds.

Wild Cockatoos Learn Which Snacks Are Safe to Eat by Copying Their Friends, New Research Suggests

Munching on the wrong items can lead to illness, but social learning might help the birds avoid making a potentially deadly mistake. The phenomenon could help explain why certain cockatoos have fared so well in urban environments

Chonkers, a Steller sea lion, is much larger than his companions, California sea lions.

Chonkers the Massive Sea Lion Drew Crowds to San Francisco’s Famed Pier 39. Then, a New Chunky Showstopper Stole His Identity

The Steller sea lion was an unusual visitor to the pier, which typically hosts smaller California sea lions. However, he may have moved on days ago, during which time a humongous member of the area’s more common species tricked onlookers

Members of the rescue team on a barge that later transported the whale to the North Sea

Timmy the Whale Was Released Into the North Sea After Being Stranded Off the German Coast for Weeks. Was That the Right Call?

The humpback whale first entered shallow water at the end of March, but its health deteriorated over the past few weeks. Experts have criticized efforts to rescue the animal, which may have done more harm than good

Lung cancer cells, shown in green, growing in a mouse heart

Cancer Is Somehow Rare in the Heart. Turns Out, the Organ’s Rhythmic Beat Might Keep the Disease at Bay, a Mouse Study Finds

Less than 1 percent of cancers start in the heart, and disease that begins elsewhere seldom spreads to the blood-pumping organ. New research suggests mechanical force might have a protective role

The Eta Aquarids as seen from Sri Lanka in 2024

The Eta Aquarid Meteor Shower Peaks This Week, but a Bright Moon Might Spoil the Show

This annual event, which peaks on the night of May 5 into the next morning, comes from the trail of debris left by Halley’s comet. It’s best viewed from the Southern Hemisphere, but skywatchers in the north can catch a glimpse

Cattle are a major driver of methane emissions.

Why Do Cows Burp Up So Much Planet-Warming Methane? A Newly Discovered Structure in Their Gut Microbes Could Be a Culprit

The “hydrogenobody” is an organelle inside certain microorganisms that live in a special stomach chamber in cattle, sheep and goats, according to a new study

Study author Gregory Bonito collects truffles in Australia. 

Australia Has a Surprisingly Successful Truffle Industry. This New Study Could Explain Why

Researchers examined hundreds of soil samples to uncover why the expensive fungi are thriving in the country

Left to right: Ethiopia's Yomif Kejelcha placed second, Kenya's Sabastian Sawe placed first, and Uganda's Jacob Kiplimo placed third

Two Athletes Smashed a Marathon Milestone, Running 26.2 Miles in Under Two Hours. Here’s the Science Behind Their Achievements

An intense training regimen, good weather conditions, physiology and lightweight shoes probably played a role in their astounding performances during the London Marathon on Sunday

Newborns usually go through tests to determine whether they have hearing problems. Undiagnosed issues can delay developmental milestones.

The FDA Approves the First-Ever Gene Therapy for Deafness, Which Aims to Restore Hearing in Kids With a Rare Inherited Condition

The agency’s decision is based on results from a clinical trial in which the treatment improved hearing in 80 percent of the pediatric participants. However, Deaf community advocates worry about the push to cure hearing loss

Undetectable infrasound might explain why some people report paranormal experiences, a new study suggests.

Worried Your House Is Haunted? The Spooky Sensation Might Arise From a Surprisingly Simple Source

Infrasound—noise below the range of typical human hearing—from power, heating and mechanical systems within buildings can make people feel irritated and induce a stress response, according to a new study

The federal government is reclassifying medical marijuana as a less dangerous drug.

State-Licensed Medical Marijuana Has Been Reclassified as a Less-Dangerous Drug. Here’s What That Means

The move should make it easier for researchers to study the substance and give tax breaks to licensed medical marijuana dealers

The monkeys sometimes steal food from tourists.

Gibraltar’s Famous Monkeys Are Eating Dirt, Likely to Alleviate Stomach Aches From Munching on Tourists’ Junk Food

The British territory’s Barbary macaques are the only wild monkeys in Europe. But many are consuming human snacks high in calories, sugar, salt and dairy, and low in fiber

A camera set up by the conservation organization Panthera captured a healthy male jaguar in the Sierra del Merendón mountain range.

A Rare ‘Cloud Jaguar’ Was Spotted in Honduran Mountains for the First Time in a Decade, Representing a Win for Conservationists

The big cats are rarely seen at high elevations, so the sighting suggests that efforts to protect a wildlife corridor in the region are working

The researchers studied neural activity in 16 participants with epilepsy who had electrodes in their brains.

We Use Many of the Same Brain Cells to See and to Imagine Objects, a Study Suggests. The Findings Provide a New Window Into Memory

While past research has hinted at an overlap in relevant brain regions, the new work drills down to the cellular level. The discovery could help improve treatments for memory disorders, such as dementia, and certain psychiatric conditions, like schizophrenia

Astronauts struggle to adapt to weightlessness, even after months on the International Space Station, a study suggests.

Astronauts’ Memories of Earth’s Gravity May Influence How They Move and Hold Objects, Even After Months in Space

Examining the fine motor skills of space travelers can help improve safety for future missions, scientists say

The hallucinogenic mushroom Psilocybe pelliculosa, which contains psilocybin

How Do Different Psychedelics Affect the Brain? Scientists Analyzed More Than 500 Neural Scans to Find Out

A new study suggests that four psychoactive compounds work in surprisingly similar ways, and that they break down the separation between how we think internally and how we perceive the outside world

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