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Chemistry

Microscopic images of the bacteria and mycelium scaffolds. The circles indicate the likely presence of S. pasteurii bacteria.

New, ‘Living’ Building Material Made From Fungi and Bacteria Could Pave the Way to Self-Healing Structures

Researchers are developing the biomaterial as a more environmentally friendly alternative to concrete, but any wide-scale use is still far away

An artist's impression of K2-18b and its distant host star, visualized as if the planet had water and a hydrogen-rich atmosphere.

Chemical Hints on a Distant Planet Offer ‘Strongest Evidence Yet’ for Life Outside Our Solar System, Astronomers Say

The James Webb Space Telescope spotted possible signatures for life in an exoplanet’s atmosphere. Still, researchers caution it’s far too early to call the findings definitive

A new, temporary pacemaker is smaller than a grain of rice.

Researchers Develop the World’s Smallest Pacemaker, and It Could Be Revolutionary for Newborn Babies With Heart Defects

The new device is smaller than a grain of rice and gets absorbed by the patient’s body when it’s no longer needed, eliminating the risks of an extraction surgery

Silas Deane, left, worked with Pierre-Augustin Caron de Beaumarchais, center, to secure gunpowder from Antoine Lavoisier, right. 

America's 250th Anniversary

How an American Merchant, a French Official and a Pioneering Chemist Smuggled Much-Needed Gunpowder to the Continental Army

The trio’s scheming became a crucial element of the fledgling nation’s success in the Revolutionary War

A depas goblet excavated from the ruins of Troy by Heinrich Schliemann in the 1870s

Cool Finds

Who Drank Wine in Ancient Troy? New Research Suggests Just About Everyone

Chemical analyses revealed wine residue on both expensive goblets and common cups unearthed among the legendary city’s ruins

In 2013, the Curiosity rover drilled this hole, which measures about 0.6 inches wide and 2.6 inches deep, into martian rock. The sample is now thought to contain long-chain organic molecules.

Curiosity Rover Discovers Largest Organic Compounds Ever Found on Mars, a Possible Sign of Ancient Life

The molecules may be remnants of fatty acids, which form cell membranes in Earth’s organisms, though they might have formed through a non-biological process

Researchers used a miniaturized laser mass spectrometer to identify signs of fossils in a gypsum quarry in Algeria. They suggest the same tool could find early fossils on Mars.

Scientists Hope This Tool Could Identify Tiny Fossils on Mars, Revealing Hints to Potential Early Life on the Planet

If Mars ever hosted microorganisms in its bygone oceans, their fossils might still be preserved in minerals—and now, we have a new potential way to find them

Ice calves off the Breidamerkurjokull, a glacier in Iceland. Some scientists suggest prehistoric glaciers hold the answers to how life evolved on Earth.

How Enormous Glaciers on the Frozen ‘Snowball Earth’ Might Have Bulldozed the Path to Complex Life on Our Planet

A new study suggests glaciers carved metals out from the Earth’s surface 700 million years ago, leading to chemical reactions in the oceans that set the stage for early animal evolution

Mars, known as the red planet, might have gotten its hue from a different mineral than scientists once thought.

The Red Dust on Mars Might Be a Different Mineral Than Scientists Thought, Shedding Light on the Planet’s Past

A new study suggests the iron oxide responsible for the red planet’s distinctive hue is ferrihydrite, pointing to the bygone presence of water, an important ingredient for life

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Five Unusual Ways People Used Lead—and Suffered For It

Cultures throughout history have put lead to use for wacky and often deeply poisonous purposes

The scientists recorded dozens of scents, which they broke down into four categories, including embalming ingredients and odors from plant oils used by modern museum conservators.

Discover the Aromas of Ancient Egyptian Mummies, From Orange Peels to Pine to Incense

A new, first-of-its-kind analysis of the scents of nine mummies detected woody, spicy, herbal and rancid notes, among other odors

Researchers say they found a way to perfectly boil eggs that accounts for the different temperature needs of the white and the yolk.

Scientists Say They’ve Found the Perfect Way to Boil an Egg. It Takes 32 Minutes and Lots of Attention

The team used computer models of computational fluid dynamics, then tested out the painstaking—yet reportedly delicious—recipe for themselves

Residents of Summerville have reported sightings of a mysterious glowing light over the town's old railroad tracks. The pictured tracks, while not the "haunted" site, were studied in an effort to determine the source of the 1886 Charleston earthquake.

The ‘Ghost’ Haunting This South Carolina Town Might Have an Earthly Explanation, Scientist Says

In a new research article, a seismologist argues that earthquakes are the reason for the mysterious lights associated with a local urban legend in Summerville

A polar bear near Kaktovik, Alaska. New research reveals how polar bears keep ice off their fur.

How Do Polar Bears Keep Ice Off Their Fur? New Study Reveals the Secret—and It Could Improve Technology

The de-icing properties of polar bear sebum could fuel new innovations, scientists say, potentially unlocking alternatives to harmful “forever chemicals” used in ice-resistant coatings today

Parts of the deep Pacific Ocean are covered in metallic lumps known as polymetallic nodules. A study published last year suggested they produce oxygen without sunlight.

Scientists Who Found Mysterious ‘Dark Oxygen’ on the Ocean Floor Plan a New Expedition, Hoping to Settle Disputes

Last year, the team made headlines when it published a paper describing how metal lumps at the bottom of the Pacific Ocean seemed to produce oxygen without sunlight

Hand-drawn illustration of two of the seven sampled molars from Australopithecus

Ape-Like Human Ancestors Were Largely Vegetarian 3.3 Million Years Ago in South Africa, Fossil Teeth Reveal

Scientists suggest meat consumption was pivotal to humans’ development of larger brains, but the transition probably didn’t start with Australopithecus, according to a new study

An international team of scientists spent four summers working in average temperatures of -25.6 degrees Fahrenheit.

Scientists Drill 1.7 Miles Into Antarctic Ice, Revealing 1.2 Million Years of Climate History

Researchers say a collected sample is the longest continuous record of Earth’s past climate from an ice core

Computer simulated global view of Venus' northern hemisphere. 

Did Venus Have Oceans? This Surprising New Study Suggests Not, a Theory That Could Upend the Search for Extraterrestrial Life

The astronomers behind the research looked to the output from the nearby planet’s toxic volcanoes for clues

The Union Carbide India Limited pesticide plant in Bhopal, India

On This Day in History

The World’s Deadliest Industrial Disaster Exposed 500,000 People to Toxic Gas and Claimed Thousands of Lives

A web of technical failures, human errors and corporate malpractice in Bhopal, India, culminated in an unthinkable tragedy on this day in 1984

The plant-based egg substitutes available today are less than perfect. Food scientists are working hard to improve them — and, maybe, make them better tasting and more nutritious than the real thing.

Scientists Are Trying to Crack the Recipe for the Perfect Plant-Based Eggs

With new ingredients and processes, the next generation of substitutes will be not just more egg-like, but potentially more nutritious

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