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Related Concept Videos

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The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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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...
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The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
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Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
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Updated: Sep 9, 2025

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Bones beneath the runway.

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  • 1Mexico City.

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PubMed
Summary
This summary is machine-generated.

A military megaproject in Mexico unearthed the country's largest paleontological find, revolutionizing our understanding of mammoth evolution and behavior.

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Area of Science:

  • Paleontology
  • Mammalogy
  • Quaternary Geology

Background:

  • A significant military construction project in Mexico inadvertently led to the discovery of a major paleontological site.
  • Initial findings suggest an unprecedented concentration of mammoth fossils, indicating a unique paleoecological setting.

Discussion:

  • The discovery challenges previous assumptions about mammoth population dynamics and habitat utilization in ancient Mexico.
  • Analysis of the fossil assemblage provides insights into the environmental conditions and potential causes of megafaunal extinction events.

Key Insights:

  • The site represents Mexico's most substantial paleontological find to date, offering a wealth of data on Pleistocene megafauna.
  • Fossil evidence indicates a complex social structure and migratory patterns in ancient mammoth populations previously undocumented.

Outlook:

  • Further research at the site promises to reshape our understanding of mammoth biology, evolution, and their role in ancient ecosystems.
  • This discovery highlights the potential for unexpected scientific breakthroughs in unconventional locations and through interdisciplinary collaboration.