Fossils are the mineralized remains of once‑living organisms, and throughout the ages they have inspired countless myths. Below we explore ten quirky pieces fossil folklore that show how ancient peoples turned stone remnants into magical stories.

10 Toadstones

Why These Pieces Fossil Capture Imagination

Sweet are the uses of adversity,
Which, like the toad, ugly and venomous,
Wears yet a precious jewel in his head.

– “As You Like It” by William Shakespeare

Round, brownish stones called Bufonite have been prized as gems for centuries. Their name comes from the Latin bufo, meaning “toad,” because medieval folk believed they were the precious jewels lodged in a toad’s skull. In the logic of sympathetic magic—like cures like—people thought that toads’ toxicity meant the stones could guard against poison.

In reality, toads never have stones in their heads. Those “toadstones” are actually the rounded teeth of an extinct fish genus, Lepidotes. Believers who suspected poisoning would even swallow a toadstone to harness its power, and because the stones were valuable, they were carefully recovered from chamber pots, washed, and reused.

9 Thunderbolts

Belemnites were squid‑like cephalopods that lived millions of years ago. When they died, only their internal, bullet‑shaped rostrum—essentially a hard, cylindrical core—remained, littering fossil beds worldwide.

Because of their uncanny shape, people imagined all sorts of fanciful origins: elf candles, St. Peter’s fingers, and, most famously, the remnants of lightning strikes. Known as thunderbolts, thunderstones, or thunder‑arrows, they were believed to possess protective powers against storms. In the Netherlands, belemnite fossils were even nailed to rooftops to keep lightning at bay before the lightning rod was invented.

8 Angel Money

Nummulites are the fossilized shells of large, single‑celled protozoans that look like tiny coins or lentils. When the Greek geographer Strabo toured the Egyptian pyramids, he was shown these coin‑shaped fossils and told they were the food remnants given to the slaves who built the monuments.

Because the fossils often appear as round, coin‑like discs, they earned names such as angel money, St. Peter’s money, or Ladislaus’s pennies. The term “nummulite” itself derives from the Latin nummulus, meaning “little coin.”

7 Snake Eggs

Sea urchins still roam the oceans today, and their skeletons are covered in spines. After death, the spines fall off, leaving a smooth ball with a five‑pointed star pattern.

Ancient observers mistook these fossilized balls for “snake eggs.” Pliny the Elder called them ovum anguinum, literally “snake eggs.” In the British Isles, folklore claimed the eggs formed from the froth of mating snakes. Legend said that if you could snatch one without letting it touch the ground and then escape the angry snakes by crossing water, the egg would protect you from poison.

6 Tongue Stones

Sharks have skeletons made of cartilage, which rarely fossilizes, but their teeth do. Massive ancient sharks such as Megalodon left teeth the size and shape of a tongue, earning the moniker glossopetrae, or “tongue stones.”

Folklore claimed these stones could neutralize poison when dipped into a drink, or that pressing a tongue stone against a snake bite would cure the wound. Some even believed the stones could reproduce, pointing to the small off‑shoots on shark teeth as “young tongue stones” budding from a parent.

These fossils played a pivotal role in the birth of paleontology. In 1666, Italian scientist Nicolaus Steno dissected a huge shark and recognized that the so‑called tongue stones were actually shark teeth, bridging myth and science.

5 Vishnu’s Chakras

Ammonites are among the most recognizable fossils, their spiral shells resembling tiny nautiluses. In the Gandaki River of Nepal, certain ammonites—called Saligrama or “Shaligrams”—are revered as sacred objects.

These fossils are thought to mirror Vishnu’s Sudarshana Chakra, the spiked disc weapon the deity wields. The most prized shaligrams are those where only the edge of the fossil peeks from the surrounding stone, giving the impression of a divine disc.

Shaligrams are kept in many Hindu temples, used in prayers, and even placed in water to cleanse sins. Touching one is considered an act of devotion.

4 St. Hilda’s Snakes

Whitby, a coastal town in northern England, is littered with ammonite fossils—so much so that they appear on the town’s coat of arms. The shape of these fossils inspired a local legend.

According to seventh‑century lore, St. Hilda wanted to build an abbey, but the site was infested with adders. Miraculously, she hurled the snakes off a cliff, turning them to stone. The resulting stone fossils became known locally as “snakestones.”

Enterprising locals even carved a snake’s head onto the end of an ammonite and sold the trinket to curious visitors.

3 Devil’s Footprints

In Italy, a series of ancient footprints known as Ciampate del Diavolo—”the Devil’s Footprints”—were discovered in volcanic ash. The ash, deposited 385,000 to 325,000 years ago, preserved the tracks of a human‑like species.

Local folklore assumed only a devil could have walked on such hot ash, giving the site its ominous name. Scientific analysis in 2003 confirmed the prints belong to the oldest‑known human species footprints in the region.

2 Dinosaur Footprints

Dinosaur tracks have fascinated observers for centuries, and cultures worldwide wove them into myth. In ancient Greece, the three‑toed tracks were attributed to heroes like Herakles. Native American tribes saw them as the footprints of giant legendary birds, while Chinese folklore linked them to dragons.

Research in China identified four main strands of interpretation: theropod tracks became “golden or heavenly chickens,” large herbivore prints were likened to rhinos, some tracks were mistaken for plant leaves, and others were simply regarded as the steps of gods.

Because stone footprints endure for eons, they continually reinforce local legends across generations.

1 Griffins

The griffin—a creature with a lion’s body and an eagle’s head—has haunted imagination for millennia. In the Gobi Desert, the skull of the dinosaur Protoceratops resembles a massive eagle head perched on a four‑legged body.

Scholars suggest that ancient travelers who uncovered these skulls combined them with other bones to fashion the legendary griffin. The detached skull, with its beaked jaws and crest, could easily become the “eagle head” of the mythic beast.

Since the 1800s, fossil fuels have powered our homes, schools, workplaces, government buildings, jails, and manufacturing enterprises. While they have provided a dependable and cost‑effective way to energize our world, they also spew harmful emissions into the atmosphere. In the quest for a cleaner future, the 10 energy resources listed below are emerging as serious contenders that could eventually replace fossil fuels, helping us slow—and perhaps even reverse—environmental degradation.

Exploring the 10 Energy Resources Landscape

10 Solar Energy

Solar power stands out as the most environmentally friendly and abundant renewable source available today, and the United States boasts some of the world’s richest solar‑irradiance zones. By harnessing sunlight, we can generate illumination, warm indoor spaces, and heat water for residential, commercial, or industrial purposes.

A wide variety of technologies now turn sunshine into usable power. Passive‑solar architecture captures heat for space heating and cooling, photovoltaic panels convert light directly into electricity, and solar thermal collectors provide hot water for homes and businesses. These solutions enable companies to diversify their energy mix, boost efficiency, and cut operating costs.

Solar energy offers clear advantages over fossil fuels, such as dramatically lower carbon emissions and virtually unlimited supply. Yet it isn’t without drawbacks. It cannot produce power at night, and regions with scant sunlight see limited benefit from panels. Installation costs remain relatively high, and the sheer area required for large‑scale arrays can be a logistical hurdle.

9 Wind Energy

Wind power, commonly called wind energy, is captured with turbines that transform the kinetic motion of moving air into electrical current. Every moving object possesses kinetic energy, and engineers have learned to tap that motion to produce clean electricity.

Even modest turbines can generate around 100 kilowatts—enough to run a typical house—while larger machines with 40‑meter (130‑foot) rotor blades can produce 1.8 megawatts. The biggest turbines on the market generate between 4.8 and 9.5 megawatts, illustrating the scalability of wind technology.

Research from carbontracker.org shows that the combined potential of wind and solar far exceeds the energy output of fossil fuels, and together they could comfortably meet global demand. Current estimates suggest we can capture at least 6,700 petawatt‑hours from sun and wind with existing technology—a figure more than 100 times today’s worldwide consumption.

8 Geothermal Energy

Geothermal power, also known as geothermal energy, offers a self‑contained, reliable way to generate electricity by exploiting the heat stored deep within the Earth’s mantle. Steam drawn from underground reservoirs spins a turbine, which in turn drives a generator to produce power.

Three main plant designs dominate the sector: dry‑steam plants that directly use underground steam, flash‑steam plants that depressurize hot water to create steam, and binary‑cycle plants that employ a secondary fluid with a lower boiling point to capture heat from moderately hot water (107‑182 °C). Each type matches different resource temperatures and geological conditions.

The United States leads the world in geothermal electricity production, generating over 3.5 gigawatts—enough to supply roughly 3.5 million homes—primarily from installations in the western states.

7 Hydropower

Hydropower derives electricity from the kinetic energy of moving water. The concept dates back more than two millennia, when ancient Greeks used water wheels to grind grain. Modern systems typically employ dams or diversion structures to channel water flow through turbines, converting mechanical motion into electrical power.

By directing water through turbines and generators, hydropower plants transform kinetic energy into electricity that feeds the grid. Historically, it was the dominant source of renewable electricity in the United States, holding the majority share until 2019.

Today, hydropower accounts for 37 % of total renewable electricity generation in the U.S. and contributes roughly 7 % of overall national electricity output, underscoring its continued importance.

6 Biomass

Biomass is a renewable organic resource sourced from plants and animals. Humans have relied on biomass for millennia—think of early cave dwellers cooking over wood fires. Today, biomass fuels modern power generators, industrial machinery, and even transportation.

While wood remains the most common biomass feedstock, other promising sources include food crops, fast‑growing grasses and woody plants, oil‑rich algae, agricultural residues, forestry waste, and the organic fraction of municipal solid waste. Even landfill methane—essentially natural‑gas‑like—can be captured and burned for energy.

Historically, biomass supplied the bulk of the United States’ energy consumption until the mid‑19th century. It still serves as a primary cooking and heating fuel in many developing nations, and several industrialized countries are expanding biomass use to offset carbon emissions from fossil fuels in both power generation and transport.

5 Hydrogen Energy

Hydrogen atoms are present in water, plants, animals, and humans, but free‑standing hydrogen gas is scarce. By extracting hydrogen from molecules—via processes like natural‑gas reforming, electrolysis, or even solar‑driven methods—we can create a versatile fuel for power generation.

When burned in a fuel cell, hydrogen produces only water, making it an exceptionally clean energy carrier. This property fuels its popularity for transportation, residential power, portable devices, and larger‑scale electricity generation. Hydrogen also serves as an effective storage medium for surplus renewable electricity.

Today’s hydrogen production relies heavily on natural‑gas reforming and electrolysis, though emerging technologies such as solar‑powered electrolysis and biological pathways are gaining traction as greener alternatives.

4 Tidal Energy

Tidal energy taps the rhythmic rise and fall of ocean tides and currents, a phenomenon driven by the gravitational interplay of the Earth, Moon, and Sun. When water is forced through narrow channels, its velocity increases, creating enough kinetic energy to drive turbines.

Ideal sites feature large tidal ranges and constricted waterways that amplify current speeds. Although many demonstration projects are under construction worldwide, the United States currently lacks any commercially operating tidal power plants.

3 Wave Energy

Wave energy harnesses the power of ocean surface waves, which arise from wind blowing across the sea. Unlike tidal power, which stems from gravitational forces, wave energy is generated by wind‑induced surface motion.

Three principal technologies exist: buoy‑or float‑based systems that convert swells into hydraulic pressure, oscillating‑water‑column devices that drive air turbines via rising and falling water columns, and tapered‑channel converters that focus wave energy into a confined path. These systems can be deployed offshore or onshore.

Wave and tidal energy are praised for their longer operational lifespans and higher predictability compared with solar and wind, whose output can fluctuate more dramatically. While still emerging, these marine technologies promise a steadier renewable supply.

2 Nuclear Energy

Nuclear power originates from fission—the splitting of uranium atoms inside a reactor. The nucleus, composed of protons and neutrons, stores immense energy; when those bonds break, a tremendous amount of heat is released, which can be turned into electricity.

In a typical nuclear plant, uranium fuel rods heat water to create high‑pressure steam, which spins turbines connected to generators. Remarkably, a single uranium pellet—about the size of a fingertip—contains as much energy as three barrels of oil, a ton of coal, or over 5,000 cubic feet of natural gas, enough to power a home for five years.

Uranium is plentiful, ensuring a long‑term fuel supply for reactors. Although nuclear power is classified as non‑renewable because the fuel itself is finite, the technology delivers massive, low‑carbon electricity, making it a pivotal bridge in the transition away from fossil fuels.

1 Ocean Thermal Energy Conversion (OTEC)

Ocean Thermal Energy Conversion (OTEC) generates electricity by exploiting the temperature difference between warm surface seawater and cold deep‑sea water to run a heat engine.

The process mirrors the natural water cycle: warm surface water is evaporated, driving a turbine that produces electricity; the resulting vapor is then condensed using cold, deep‑water, completing the cycle. This continual temperature gradient provides a steady power source.

Rising electricity costs, heightened climate concerns, and a push for energy security have spurred interest in OTEC, especially for tropical islands that currently rely on costly oil‑generated power. As technology matures, OTEC could become a cost‑effective solution for regions like the southeastern United States and many island nations worldwide.