Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography Offbeat: Earth and Climate Offbeat: General Offbeat: Paleontology and Archeology Paleontology: Climate
Published

Local bright spot among melting glaciers: 2000 km of Antarctic ice-covered coastline has been stable for 85 years      (via sciencedaily.com)     Original source 

A whaler's forgotten aerial photos from 1937 have given researchers the most detailed picture of the ice evolution in East Antarctica to date. The results show that the ice has remained stable and even grown slightly over almost a century, though scientists observe early signs of weakening. The research offers new insights that enhance predictions of ice changes and sea level rise.

Anthropology: Early Humans Anthropology: General Biology: Biochemistry Biology: Biotechnology Biology: Cell Biology Biology: Evolutionary Biology: General Biology: Genetics Biology: Zoology Ecology: Extinction Paleontology: Early Mammals and Birds Paleontology: Fossils Paleontology: General
Published

Bringing back an ancient bird      (via sciencedaily.com)     Original source 

Using ancient DNA extracted from the toe bone of a museum specimen, biologists have sequenced the genome of an extinct, flightless bird called the little bush moa, shedding light into an unknown corner of avian genetic history. The work is the first complete genetic map of the turkey-sized bird whose distant living cousins include the ostrich, emu, and kiwi.

Biology: Biochemistry Biology: Cell Biology Biology: Developmental Biology: Evolutionary Biology: General Biology: Genetics Offbeat: Earth and Climate Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals
Published

How killifish embryos use suspended animation to survive over 8 months of drought      (via sciencedaily.com)     Original source 

The African turquoise killifish lives in ephemeral ponds in Zimbabwe and Mozambique. To survive the annual dry season, the fish's embryos enter a state of extreme suspended animation or 'diapause' for approximately 8 months. Now, researchers have uncovered the mechanisms that enabled the killifish to evolve this extreme survival state.

Biology: Biochemistry Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Early Mammals and Birds Paleontology: Fossils Paleontology: General
Published

Florida fossil porcupine solves a prickly dilemma 10-million years in the making      (via sciencedaily.com)     Original source 

An exceptionally rare fossilized porcupine skeleton discovered in Florida has allowed researchers to trace the evolutionary history for one of North America's rarest mammals.

Biology: Biochemistry Biology: Evolutionary Biology: General Biology: Zoology Ecology: Animals Environmental: General Geoscience: Environmental Issues Offbeat: Earth and Climate Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals
Published

Entomologist sheds light on 250-year-old mystery of the German cockroach      (via sciencedaily.com)     Original source 

Entomologists have solved the 250-year-old origin puzzle of the most prevalent indoor urban pest insect on the planet: the German cockroach. The team's research findings, representing the genomic analyses of over 280 specimens from 17 countries and six continents, show that this species evolved some 2,100 years ago from an outdoor-living species in Asia.

Biology: Biochemistry Biology: Evolutionary Biology: General Biology: Zoology Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Dinosaurs Paleontology: Early Mammals and Birds Paleontology: Fossils Paleontology: General
Published

Researchers discover hidden step in dinosaur feather evolution      (via sciencedaily.com)     Original source 

Scientists discover 'zoned development' in dinosaur skin, with zones of reptile-style scales and zones of bird-like skin with feathers. A new dinosaur skin fossil has been found to be composed of silica -- the same as glass.

Biology: Evolutionary Biology: General Ecology: Endangered Species Ecology: Extinction Ecology: Nature Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Fossils Paleontology: General
Published

How did sabre-toothed tigers acquire their long upper canine teeth?      (via sciencedaily.com)     Original source 

In a groundbreaking study an international team of scientists has investigated the evolutionary patterns behind the development of sabre teeth, with some unexpected results along the way.

Anthropology: General Biology: Botany Biology: Evolutionary Biology: General Ecology: Animals Offbeat: Earth and Climate Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals
Published

Iconic baobabs: The origin and long-distance travels of upside down trees      (via sciencedaily.com)     Original source 

The research cracks the code on the iconic baobab tree's origin story, revealing their surprising origins in Madagascar and incredible long-distance dispersals to Africa and Australia. The study unveils how baobabs developed unique pollination mechanisms -- some attracting hawkmoths, others lemurs, and even bats -- showcasing remarkable evolutionary adaptations. The research sheds light on how climate change has shaped the baobab's distribution and diversification over millions of years, offering valuable insights for understanding plant responses to future environmental shifts.

Biology: Biochemistry Ecology: Extinction Ecology: Nature Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Dinosaurs Paleontology: Early Mammals and Birds Paleontology: General
Published

First 'warm-blooded' dinosaurs may have emerged 180 million years ago      (via sciencedaily.com)     Original source 

The ability to regulate body temperature, a trait all mammals and birds have today, may have evolved among some dinosaurs early in the Jurassic period about 180 million years ago. The new study looked at the spread of dinosaurs across different climates on Earth throughout the Mesozoic Era (the dinosaur era lasting from 230 to 66 million years ago), drawing on 1,000 fossils, climate models and the geography of the period, and dinosaurs' evolutionary trees.

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Published

Did a magnetic field collapse trigger the emergence of animals?      (via sciencedaily.com)     Original source 

Researchers uncovered compelling evidence that Earth's magnetic field was in a highly unusual state when the macroscopic animals of the Ediacaran Period -- 635 to 541 million years ago -- diversified and thrived. Their study raises the question of whether these fluctuations in Earth's ancient magnetic field led to shifts in oxygen levels that may have been crucial to the proliferation of life forms millions of years ago.

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75,000-year-old female Neanderthal from cave where species buried their dead      (via sciencedaily.com)     Original source 

A new documentary has recreated the face of a 75,000-year-old female Neanderthal whose flattened skull was discovered and rebuilt from hundreds of bone fragments by a team of archaeologists and conservators.

Anthropology: Early Humans Anthropology: General Archaeology: General Paleontology: Fossils Paleontology: General
Published

Revised dating of the Liujiang skeleton renews understanding of human occupation of China      (via sciencedaily.com)     Original source 

Researchers have provided new age estimates and revised provenance information for the Liujiang human fossils, shedding light on the presence of Homo sapiens in the region. Using advanced dating techniques including U-series dating on human fossils, and radiocarbon and optically stimulated luminescence dating on fossil-bearing sediments, the study revealed new ages ranging from approximately 33,000 to 23,000 years ago. Previously, studies had reported ages of up to 227,000 years of age for the skeleton.

Anthropology: Early Humans Anthropology: General Archaeology: General
Published

How evolving landscapes impacted First Peoples' early migration patterns into Australia      (via sciencedaily.com)     Original source 

Scientists have applied a dynamic model of the landscape to patterns of human migration into Sahul, the combined continent of Australia, Tasmania and New Guinea.

Biology: Biochemistry Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: General
Published

The double-fanged adolescence of saber-toothed cats      (via sciencedaily.com)     Original source 

How did North America's saber-toothed cats hunt without breaking their unwieldy saber-like canines, which are vulnerable to sideways bending stresses? A paleontologist provides mechanical evidence that during adolescence, when young cats were learning to hunt, their baby teeth remained in place for up to 30 months to laterally buttress the emerging permanent sabers. By the time the baby teeth fell out, presumably the adult cat knew how to protect its sabers during attacks.

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Published

More plants on the menu of ancient hunter-gatherers      (via sciencedaily.com)     Original source 

It has long been thought that meat played an important role in the diet of hunter-gatherers before the Neolithic transition. However, due to the scarcity of well-preserved human remains from Paleolithic sites, little information exists about the dietary habits of pre-agricultural human groups. A new study challenges this notion by presenting compelling isotopic evidence of a strong preference for plants among 15,000-year-old hunter-gatherers from Morocco. This is the first time a significant amount of plant consumption has been measured for a pre-agricultural population, shedding new light on the dietary practices of ancient human societies.

Anthropology: Cultures Anthropology: General Archaeology: General Biology: Biochemistry Ecology: Endangered Species Geoscience: Environmental Issues Offbeat: Earth and Climate Offbeat: General Offbeat: Paleontology and Archeology Offbeat: Plants and Animals Paleontology: Fossils
Published

Ancient Maya blessed their ballcourts      (via sciencedaily.com)     Original source 

Using environmental DNA analysis, an international team of researchers identified a collection of plants used in ceremonial rituals in the ancient Maya city of Yaxnohcah in Mexico. The plants, known for their religious associations and medicinal properties, were discovered beneath a plaza floor where a ballcourt was built.

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These giant, prehistoric salmon had tusk-like teeth      (via sciencedaily.com)     Original source 

Oncorhynchus rastrosus, a giant species of salmon that lived in the North American Pacific Northwest a few million years ago, sported a pair of front teeth that projected out from the sides of its mouth like tusks, according to a new study.