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Related Concept Videos

Carbon Skeletons01:12

Carbon Skeletons

Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...
Phylogeny01:23

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire...
Phylogenetic Trees03:21

Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.The length of the branches can depict time or the relative amount of change among organisms. For instance, the branch length might indicate the number of amino acid changes in the sequence that underlies the...
The Fossil Record02:56

The Fossil Record

The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
Radioactive Decay and Radiometric Dating02:48

Radioactive Decay and Radiometric Dating

Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both extant and...

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Related Experiment Video

Updated: Jul 8, 2026

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
07:57

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis

Published on: August 15, 2018

PALEONTOLOGY: Fossils Made to Order, Any Size.

E Stokstad

    Science (New York, N.Y.)
    |September 11, 2007
    PubMed
    Summary

    Researchers created lightweight dinosaur limb replicas using 3D scanning and rapid prototyping. This allows for easier study of dinosaur posture and gait, overcoming the challenge of heavy fossilized bones.

    Area of Science:

    • Paleontology
    • Biomechanics

    Background:

    • Studying dinosaur posture and gait requires analyzing limb articulation.
    • Large dinosaur fossils, such as shoulderblades, are extremely heavy, hindering research.
    • Traditional methods for studying fossilized limbs are challenging due to their size and weight.

    Purpose of the Study:

    • To develop a method for studying the posture and gait of large dinosaurs.
    • To overcome the physical limitations posed by the weight and size of dinosaur fossils.

    Main Methods:

    • Utilized industrial scanning technology to capture detailed 3D data of fossilized dinosaur limb bones.
    • Employed rapid prototyping techniques to create lightweight, scaled replicas of these bones.
    • Focused on large elements like shoulderblades that present significant weight challenges.

    More Related Videos

    Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
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    Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains

    Published on: November 30, 2021

    Using Archival Japanese Paper and Thermoplastic Resins to Prepare Fossils for Storage, Display, Transport, and Radiography
    07:30

    Using Archival Japanese Paper and Thermoplastic Resins to Prepare Fossils for Storage, Display, Transport, and Radiography

    Published on: November 14, 2025

    Related Experiment Videos

    Last Updated: Jul 8, 2026

    Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
    07:57

    Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis

    Published on: August 15, 2018

    Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
    06:18

    Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains

    Published on: November 30, 2021

    Using Archival Japanese Paper and Thermoplastic Resins to Prepare Fossils for Storage, Display, Transport, and Radiography
    07:30

    Using Archival Japanese Paper and Thermoplastic Resins to Prepare Fossils for Storage, Display, Transport, and Radiography

    Published on: November 14, 2025

    Main Results:

    • Successfully produced portable, high-fidelity replicas of large dinosaur limb bones.
    • These replicas significantly reduce the weight and bulk associated with studying massive fossils.
    • Enabled easier manipulation and analysis of skeletal structures crucial for biomechanical studies.

    Conclusions:

    • Industrial scanning and rapid prototyping offer a viable solution for paleontological research on large extinct animals.
    • This technological approach facilitates more accessible and detailed biomechanical analyses of dinosaur locomotion.
    • Future studies on dinosaur posture and gait can benefit from these advanced replication methods.