ScienceSunday, November 15, 20261 min read

Dinosaurs may have been eating seaweed 100 million years ago

By ScienceDaily Top Science · Published by Everything Blog

In short

Researchers examined carbon isotope ratios in Cretaceous fossils to resolve why previous dental studies detected unexpectedly high levels of heavy carbon isotopes. By comparing specimens from inland areas to those along the Gulf of Mexico and the Western Interior Seaway, scientists determined that marine vegetation boosted these signatures in shoreline species. The findings confirm that ancient coastal inhabitants such as dinosaurs, turtles, and crocodiles regularly fed on marine materials.

Key points

Prehistoric land animals living along ancient coastlines routinely integrated ocean nutri…: Prehistoric land animals living along ancient coastlines routinely integrated ocean nutrients into their regular diets.
The chemical signatures indicate that both ancient herbivores and predators benefited fro…: The chemical signatures indicate that both ancient herbivores and predators benefited from washed-up marine resources.
Marine subsidization played a significant ecological role in sustaining terrestrial coast…: Marine subsidization played a significant ecological role in sustaining terrestrial coastal food chains over 100 million years ago.

Sources checked by our analysis pipeline: 1

- Date:

- November 14, 2026

- Source:

- Frontiers

- Summary:

- Dinosaurs may have been snacking on seaweed and other ocean foods more than 100 million years ago, according to surprising new evidence hidden in their fossilized teeth. Researchers discovered chemical signatures suggesting that coastal dinosaurs and other prehistoric animals relied partly on nutrients originating in the sea. The findings reveal that marine resources traveled through ancient food chains, supplementing the diets of everything from plant-eating dinosaurs to predators.

- Share:

Dinosaurs living along ancient coastlines may have enjoyed an unexpected addition to their diets: seaweed and other food from the ocean. New research suggests that marine resources washed onto prehistoric beaches helped feed dinosaurs and their prey millions of years ago.

Today, powerful storms frequently deposit seaweed and other ocean material along shorelines, creating opportunities for animals that live on land to find additional food. Scientists call this process marine subsidization (MS). It is especially common in coastal environments and can become more important when food on land is limited, such as during droughts.

A new study…

AI Analysis

Tone

Neutral

In short

Key Points

Prehistoric land animals living along ancient coastlines routinely integrated ocean nutri…: Prehistoric land animals living along ancient coastlines routinely integrated ocean nutrients into their regular diets.
The chemical signatures indicate that both ancient herbivores and predators benefited fro…: The chemical signatures indicate that both ancient herbivores and predators benefited from washed-up marine resources.
Marine subsidization played a significant ecological role in sustaining terrestrial coast…: Marine subsidization played a significant ecological role in sustaining terrestrial coastal food chains over 100 million years ago.

Topics

Science

Was this summary useful?

AI Analysis

Tone

Neutral

In short

Key Points

Prehistoric land animals living along ancient coastlines routinely integrated ocean nutri…: Prehistoric land animals living along ancient coastlines routinely integrated ocean nutrients into their regular diets.
The chemical signatures indicate that both ancient herbivores and predators benefited fro…: The chemical signatures indicate that both ancient herbivores and predators benefited from washed-up marine resources.
Marine subsidization played a significant ecological role in sustaining terrestrial coast…: Marine subsidization played a significant ecological role in sustaining terrestrial coastal food chains over 100 million years ago.

Topics

Science

Was this summary useful?

4,000-year-old jug holds seeds of flower found nowhere else
Excavations led by Derya Yilmaz Tekin at the Külhöyük mound in Ankara's Gölbaşı district revealed the ancient specimen inside a central Bronze Age structure. The discovery confirms that the critically endangered species has inhabited the immediate area for millennia despite modern survival pressures. These historical findings offer critical context for ongoing conservation programs striving to protect the plant from habitat loss and agricultural chemicals.
3 min read
Scientists discover a bizarre paradox among endangered penguins
Researchers using drone surveys have mapped the only two global breeding sites of New Zealand's Erect-crested penguins, uncovering starkly contrasting survival rates between the locations. While colonies on the tiny Bounty Islands have remained stable for 25 years, birds on the much larger Antipodes Islands have suffered severe declines. This unexpected divergence highlights how local environmental pressures can threaten an endangered species unevenly.
6 min read
Physicists use laser light to unlock a crystal's hidden electrical powers
Auburn University researchers have revealed how optical pulses can briefly arrange microscopic electrical zones within modified strontium titanate. This breakthrough settles a longstanding debate over how internal order arises as materials cool, proving these polarized domains preexist rather than develop simultaneously. The achievement indicates that optical control could ultimately drive the development of ultra-fast information storage and processing devices.
4 min read

Dinosaurs may have been eating seaweed 100 million years ago

In short

Key points

More in Science