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New study charts how Earth’s global temperature has drastically changed over the past 485 million years, driven by carbon dioxide

A new study reveals that Earth's surface temperature has varied more greatly over the past 485 million years than previously thought. The study, co-led by the Smithsonian and University of Arizona, confirms that carbon dioxide is strongly correlated with global temperatures across geological time.

SourceSmithsonian·JournalScience·TypeObservational study·DateSep 19, 2024

House call: A new study rethinks early Christian landmark

A new study published in the Journal of Roman Archaeology argues that an ancient structure known as the 'Christian building' was not a domestic house church, but rather a space renovated for worship. The findings suggest significant differences between the building's features and those of other domestic structures in Dura-Europos.

SourceYale University·JournalJournal of Roman Archaeology·DateAug 13, 2024

'Screaming Woman' mummy may have died in agony 3,500 years ago

Researchers found the woman was embalmed with costly imported ingredients, contradicting traditional beliefs about mummification. The study also revealed she suffered from arthritis and had a unique facial expression that may be attributed to a cadaveric spasm caused by intense pain.

SourceFrontiers·JournalFrontiers in Medicine·TypeObservational study·DateAug 2, 2024

Taco-shaped arthropod from Royal Ontario Museum’s Burgess Shale fossils gives new insights into the history of the first mandibulates

Researchers reveal Odaraia alata's intricate system of spines that could capture prey, and its pair of large appendages with grasping edges indicative of mandibles. The study provides new insights into the evolution and ecology of early mandibulates in marine ecosystems.

SourceRoyal Ontario Museum·JournalProceedings of the Royal Society B Biological Sciences·DateJul 23, 2024

Ammonites went out with a diverse bang—and not a long, slow fizzle—in the Late Cretaceous

A new study using museum collections reveals that ammonites were diverse and thriving across the globe just before their extinction in the Late Cretaceous. The research found that the balance of speciation and extinction rates varied by region, contradicting previous theories.

SourceNatural History Museum of Los Angeles County·JournalNature Communications·TypeData/statistical analysis·DateJun 27, 2024

Researchers find genetic stability in a long-term Panamanian hybrid zone of manakins

Hybrids between two manakin species in Panama have remained relatively stable over the past 30 years, with minimal changes in genomic markers. The phenotypic transition zone also shows stability, with only one trait having shifted location, suggesting a potential selection for green bellies.

Clues to mysterious disappearance of North America’s large mammals 50,000 years ago found within ancient bone collagen

Researchers used novel biomolecular methods to analyze fossil bone fragments at the Smithsonian Museum, revealing excellent preservation of collagen proteins that can provide a molecular barcode for identification. The study provides new insights into the mysterious disappearance of North America's large mammals 50,000 years ago.

SourceFrontiers·JournalFrontiers in Mammal Science·TypeExperimental study·DateMay 31, 2024

Echidnapus identified from an ‘Age of Monotremes’

Australian researchers have identified a new species of ancient 'echidnapus', which exhibits platypus-like anatomy alongside echidna-like features. The discovery sheds light on the evolutionary history of monotremes, revealing six different egg-laying mammals living together in the same area over 100 million years ago.

SourceTaylor & Francis Group·JournalAlcheringa An Australasian Journal of Palaeontology·DateMay 26, 2024

Laser imaging could offer early detection for at-risk artwork

Researchers develop laser microscopy technique to analyze pigments in artwork, detecting chemical changes that mark the onset of decay. The technique uses ultra-fast pulses of light to create 3D maps of certain pigments, allowing for nondestructive analysis and early detection of fading.

SourceDuke University·JournalJournal of Physics Photonics·TypeExperimental study·DateApr 29, 2024

A lighthouse in the Gobi desert

A new study quantifies the impact of great fossil sites on our understanding of evolutionary relationships between fossil groups, discovering that the Gobi Desert's well-preserved lizard record shapes understanding more than any other site. The study's findings highlight the importance of exceptional fossil preservation in shaping our ...

SourceNatural History Museum of Los Angeles County·JournalPLOS ONE·TypeData/statistical analysis·DateFeb 14, 2024

New study finds life on land is more vulnerable to mass extinctions than life in the oceans and takes longer to recover

A new study published in Proceedings of the Royal Society B found that the end-Triassic extinction had a greater impact on terrestrial ecosystems than marine ecosystems. Terrestrial ecosystems took longer to recover from mass extinction events, with higher extinction severity and fewer groups occupying key ecological roles.

SourceNatural History Museum of Los Angeles County·JournalProceedings of the Royal Society B Biological Sciences·TypeData/statistical analysis·DateFeb 12, 2024