Explore over 46,000 pages of Charles Darwin's manuscripts

Review an historical exploration of Charles Darwin's expeditions

Darwin spent more than half of the Beagle expedition in Patagonia, discovering large mammal fossils, including extinct sloths. He journaled about the Argentine genocide of Indigenous peoples in the regions while making findings that would contribute to his theory of evolution.

Whose bodies are held inside the American Museum of Natural History?

The American Museum of Natural History holds the remains of at least 12,000 people collected via purchase, donation, or expedition. This article by a professor of art crime details their attempt to identify the individuals whose remains the museum held. Amid questioning, AMNH announced it would change its human remains policy. At the time of the article's publication in October 2023, AMNH had few human remains on public display.

View a directory of more than 300 dinosaurs

This resource details each dinosaur's taxonomy, type, diet, and habitat, from Aardonyx to Zuniceratops. More well-researched dinosaurs include information on when they were discovered alongside their size, behaviors, and other noteworthy findings.

View a collection of historical documents about molecular biology's history

The collection features materials related to those involved in the discovery of DNA and provides historical context for the discoveries of RNA, various viruses, and important bioproteins. The items include photographs, business correspondence, manuscripts, and scientific instruments.

A free archive of firsthand historical documents from explorers of America

Maintained by the Wisconsin Historical Society, the American Journeys collection contains more than 18,000 pages of primary source documents—journals, letters, maps, and accounts written between roughly 1000 CE and the early 1800s. These include eyewitness records of the Norse arrival in North America, Spanish conquistador expeditions, and the Lewis and Clark journey. Browse this list of highlights where pages from the original texts are specified (clicking a link opens a PDF).

Nearly 99% of the Smithsonian's specimens are hidden in high-security

At the National Museum of Natural History, nearly 99% of its 147 million specimens are stored in secure research collections rather than on display, where they are actively used for scientific work ranging from tracking invasive species to improving aviation safety.

Explore these collections of early human fossils

The human fossil record is filled with massive gaps, leaving archaeologists tiny samples to try and glean the history of our species. At this site, you can browse through the human fossil collection, including 3D rotatable scans of hundreds of fossils from different species of early humans.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

Browse Emily Dickinson's original handwritten poems

Harvard's Emily Dickinson Archive offers free access to the poet's papers from over a dozen libraries, allowing you to see the original drafts of some of her most famous works, sometimes scribbled on envelopes and scraps of paper. (And, even better, you can search the database by typing in your favorite lines!)

Human anatomy provides evidence for evolution

Throughout history, scientists have used anatomy to support the Theory of Evolution in three main ways. Homologous structures, or similar physical features in organisms that serve different functions, can help scientists understand common ancestors....

Browse an Orwell superfan's book collection

This Brown University Library exhibit displays scans from collector Daniel Leab's extensive trove of Orwell's works, including many first editions and translations. In addition to the beautiful covers, there's also plenty of fascinating bibliographic information.

The expedition documented 240 plant species, 178 new to western science

Lewis and Clark’s botanical records introduced species to Americans like bitterroot, ponderosa pine, and Oregon grape—plants unknown to western science at the time. See a selection of these species in this image gallery.

Explore hundreds of the brother’s personal photographs of flights, family and dogs

Their estate offered 300 negatives to the Library of Congress in 1948 after Orville’s death, most of which were taken by the brothers between 1897 and 1928. The collection serves as a visual timeline of their adult lives.

Explore a database of more than 200,000 wrecks

Only a small fraction of shipwrecks occurring throughout human history have been discovered. This database is the largest compilation to date, and includes more than 80,000 images, with related news updated on a rolling basis.

Travel through deep time with this interactive Earth

Explore key moments in Earth’s transformative history as continents drift and climate fluctuates over 4.6 billion years. The Smithsonian presents a series of interactive snapshots of the earth. From its toddler years during the Hadean period, when its surface was mostly molten, to the mostly unidentifiable landmasses of the future earth, 100 million years from now.

See rare Civil War photographs preserved by the National Archives

The Civil War was the first major American conflict documented by a camera, with its images distributed widely to the public. The National Archives' digital collection offers thousands of original Civil War images: portraits, battlefields, hospitals, and everyday life.

A gallery of medical illustrations from NIH

The National Institutes of Health provides educational materials for broad use. The institute hosts a Flickr account with many different image galleries, including this one (with over 70 images to date) that illustrate and annotate curious phenomena, from the life cycles of a malaria parasite to the comparison of male and female bladders. Explore the gallery here.

She sells seashells by the seashore or, more accurately, she sells dinosaur fossils along the Jurassic Coast

Now known as the mother of paleontology, Mary Anning was 12 years old in 1811 when her seashore scrounging uncovered an ichthyosaur fossil, the first complete one known to the London scientific community at the time. She spent the rest of her life contributing to a field that didn’t care to welcome her. This article details her life and work.

Charles Darwin studied goose bumps by scaring zoo animals in London with a stuffed snake

Read the famous naturalist’s work from the late 1800s, detailing how he sought to draw comparisons between how animals and humans respond to fear. As part of that work, he exposed monkeys and a peccary to a stuffed snake and noted the animals’ hair-raising fear response.

Unraveling the charred remains of the only known library from antiquity

This article details the quest to decipher the charred remains of a library buried during Mt. Vesuvius' volcanic blast. In 1752, nearly 2,000 papyrus scrolls were found in Herculaneum. According to this article, this collection is the only complete library that has survived from antiquity. In the last decade, scientists have made strides in decoding the crumbling texts.

Read Charles Darwin's description of his tinnitus suffering

When he was 57 years old, Darwin wrote to a new doctor about his suffering from a variety of maladies, including "singing of ears", vomiting, recurring flatulence, vomiting, and more. He noted how he believed his stress contributed to these symptoms.

The Metropolitan Museum of Art, explained

The Metropolitan Museum of Art, founded in 1870, houses 1.5 million works spanning centuries—from ancient Egyptian artifacts to impressionist masterpieces. Its iconic Fifth Avenue building, designed by architect Richard Morris Hunt, and tranquil Cloisters location reflect its dedication to showcasing global creativity.

A list of some of the best episodes from David Attenborough's works and where to watch them

From the first steps of the long-eared jerboa—an animal not captured on film before "Life Story"—and bears catching salmon on their upstream pilgrimages to the bioluminescent sea creatures in the trenches of the ocean and Weddell seals giving birth, learn where to see some of the most remarkable moments in Attenborough's catalog.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

Watch a salamander grow from fertilization to hatching

New microscopy techniques have allowed scientists to image the development of animal embryos with unprecedented detail. This six-minute time-lapse reveals the development of a salamander from initial fertilization to hatching from an egg.

Particle accelerators have been used to reveal detailed ant anatomy

Using a synchrotron facility at the Karlsruhe Institute of Technology in Germany, a pair of X-ray beams swept across about 2,200 ant specimens to create over 200 terabytes of projection images from multiple angles. The images were compiled into micrometer-resolution 3D reconstructions of 792 species, which are freely accessible on the Antscan platform.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

Against his wishes, Albert Einstein's brain was removed before his cremation, and the pathologist responsible stored it for decades in mason jars within a beer cooler.

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Explore the archaeological treasures of Pompeii, the city buried under volcanic ash when Mount Vesuvius erupted in 79 CE.

Indefinite cloning of some endangered species may not sustain their longevity because cloning success rates decrease as genetic mutations accumulate.

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

This real-time tracking of the hantavirus cruise ship outbreak in May 2026 offers a unique glimpse into the global reach of the outbreak and whether the virus sickened passengers and their communities around the world.

See these 16 pieces of art evoking phobias of snakes, flying, spiders, and more. 

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

Explore a list of the 100 best novels of all time, compiled by some of the world's best living writers, including Salman Rushdie, Stephen King, and Jennifer Egan.

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

Massive blooms of microscopic plankton called dinoflagellates produce the neon blue light seen in glowing tides.

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

Walt Disney's early film 'Alice's Wonderland' was a groundbreaking innovation in the silent film era

Bone marrow (soft tissue found inside certain bones) generates roughly 500 billion new blood cells each day