Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Diversity of Protists III01:27

Diversity of Protists III

536
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
536
Ionic Crystal Structures02:42

Ionic Crystal Structures

16.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
16.2K
Biosynthesis of Lipids01:29

Biosynthesis of Lipids

289
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
289
The Fossil Record02:56

The Fossil Record

26.5K
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...
26.5K
Archaeal Cell Wall01:29

Archaeal Cell Wall

610
Archaeal cell walls are structurally and compositionally distinct from their bacterial counterparts, lacking the characteristic peptidoglycan layer found in most bacteria. Instead, archaeal cell walls exhibit remarkable diversity, utilizing materials such as pseudomurein, polysaccharides, and proteins to construct their protective outer layers. This structural flexibility is closely tied to archaea's ecological adaptability.S-Layers: The Common Archaeal Cell WallThe S-layer is the most...
610
Diversity of Archaea III01:27

Diversity of Archaea III

194
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
194

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A trajectory analysis of blood pressure development during pregnancy. An inception cohort study.

Pregnancy hypertension·2026
Same author

<sup>16</sup>O poor cosmic spherules from near-Earth CY chondrite asteroids.

Science advances·2026
Same author

A long-lived impact-generated hydrothermal system at the Chicxulub impact structure.

Communications earth & environment·2026
Same author

Extraterrestrial <sup>3</sup>He flux variability during the Triassic recorded in pelagic bedded cherts of Japan.

Proceedings of the Japan Academy. Series B, Physical and biological sciences·2026
Same author

Biochemical osteomalacia during pregnancy or lactation: an observational study in Sweden.

BMC pregnancy and childbirth·2026
Same author

Iron deficiency induces maturation-dependent loss of pancreatic β-cells.

Nature communications·2026

Related Experiment Video

Updated: Nov 16, 2025

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
05:41

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

9.8K

Globally distributed iridium layer preserved within the Chicxulub impact structure.

Steven Goderis1, Honami Sato2,3, Ludovic Ferrière4

  • 1Analytical, Environmental, and Geochemistry, Vrije Universiteit Brussel, Brussels, Belgium. steven.goderis@vub.be.

Science Advances
|February 25, 2021
PubMed
Summary

The Chicxulub impact event, 66 million years ago, left an iridium anomaly in its peak-ring sequence. This discovery provides a crucial link between the Chicxulub crater and global Cretaceous-Paleogene boundary sections.

More Related Videos

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.6K
IridiumIII Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II
12:52

IridiumIII Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II

Published on: July 7, 2015

9.4K

Related Experiment Videos

Last Updated: Nov 16, 2025

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
05:41

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

9.8K
Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

10.6K
IridiumIII Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II
12:52

IridiumIII Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II

Published on: July 7, 2015

9.4K

Area of Science:

  • Geoscience
  • Paleontology
  • Planetary Science

Background:

  • The Cretaceous-Paleogene (K-Pg) mass extinction event is globally recognized by elevated iridium concentrations.
  • This iridium layer is attributed to a hypervelocity asteroid impact approximately 66 million years ago.

Purpose of the Study:

  • To analyze iridium concentrations within the Chicxulub impact structure's peak-ring sequence.
  • To establish a precise temporal link between the Chicxulub impact and global K-Pg boundary sections.

Main Methods:

  • Analysis of drill core samples from IODP-ICDP Expedition 364.
  • High-precision iridium concentration measurements conducted by four independent laboratories.

Main Results:

  • A distinct positive iridium anomaly was detected within the peak-ring sequence of the Chicxulub impact structure.
  • The highest concentration of meteoritic matter was found in post-impact sediments just below the Danian limestone.
  • This layer serves as a precise temporal marker correlating Chicxulub with worldwide K-Pg boundary sites.

Conclusions:

  • The iridium anomaly confirms the Chicxulub impact's role in the K-Pg mass extinction.
  • The studied sediments offer detailed insights into the post-impact recovery of life.
  • This research solidifies the Chicxulub impact structure as a key reference point for understanding the K-Pg boundary event.