Exquisitely preserved embryo found inside fossilized dinosaur egg
A 72- to 66-million-year-old embryo found inside a fossilized dinosaur egg sheds new light on the link between the behavior of modern birds and dinosaurs, according to a new study......»»
Curiosity rover finds patches of rock record erased, revealing clues
A new paper enriches scientists' understanding of where the rock record preserved or destroyed evidence of Mars' past and possible signs of ancient life......»»
New fossil sheds light on the evolution of how dinosaurs breathed
An international team of scientists has used high-powered X-rays at the European Synchrotron, the ESRF, to show how an extinct South African dinosaur, Heterodontosaurus tucki, breathed. The study is published in eLife on 6 July 2021......»»
The City of David and the sharks" teeth mystery
Scientists have found an unexplained cache of fossilized shark teeth in an area where there should be none—in a 2900 year old site in the City of David in Jerusalem. This is at least 80 km from where these fossils would be expected to be found. The.....»»
Scientists publish a how-to guide for creating mouse-human chimeric embryos
A year after University at Buffalo scientists demonstrated that it was possible to produce millions of mature human cells in a mouse embryo, they have published a detailed description of the method so that other laboratories can do it, too......»»
Spatial patterns of gene transcripts captured across single cells of mouse embryo
A new technique called sci-Space, combined with data from other technologies, could lead to four-dimensional atlases of gene expression across diverse cells during embryonic development of mammals......»»
Embryo freezing for IVF appears linked to blood pressure problems in pregnancy
A large cohort study drawn from the national IVF registry of France, which included almost 70,000 pregnancies delivered after 22 weeks gestation between 2013 and 2018, has found a higher risk of pre-eclampsia and hypertension in pregnancies derived f.....»»
Searching 230-Million-Year-Old Poop, Scientists Find a New Beetle
A new species emerged from three-dimensional x-rays of droppings left by a close dinosaur relative -- Read more on ScientificAmerican.com.....»»
New beetle species found pristinely preserved in fossilized dropping of dinosaur ancestor
Fossilized feces are common finds at paleontological dig sites and might actually contain hidden treasures. By scanning fossilized dung assigned to a close dinosaur relative from the Triassic period, scientists discovered a 230-million-year-old beetl.....»»
Ancient carved snake found in Finland
A pair of researchers from the University of Turku and the University of Helsinki, respectively, both in Finland, has found a well-preserved ancient carved snake at Järvensuo 1, a dig site in south-west Finland. In their paper published on the Cambr.....»»
Digging into the molecules of fossilized dinosaur eggshells
Dinosaurs roamed the Earth more than 65 million years ago, and paleontologists and amateur fossil hunters are still unearthing traces of them today. The minerals in fossilized eggs and shell fragments provide snapshots into these creatures' early liv.....»»
Study provides first genome-wide evidence for functional importance of unusual DNA structures
Some regions of the human genome where the DNA can fold into unusual three-dimensional structures called G-quadruplexes (G4s) show signs that they are preserved by natural selection. When G4s are located in the regulatory sequences that control how g.....»»
The evolution of axial patterning
Body axes are molecular coordinate systems along which regulatory genes are activated. These genes then activate the development of anatomical structures in correct locations in the embryo. Thus, the body ensures that we do not develop arms on our he.....»»
"Dragon man" fossil may replace Neanderthals as our closest relative
A near-perfectly preserved ancient human fossil known as the Harbin cranium sits in the Geoscience Museum in Hebei GEO University. The largest of known Homo skulls, scientists now say this skull represents a newly discovered human species named Homo.....»»
Dinosaurs Lived In the Arctic, Research Suggests
An array of tiny fossils suggests dinosaurs not only roamed the Arctic, but hatched and raised their young there too. The Guardian reports: While dinosaur fossils have previously been found in the Arctic, it was unclear whether they lived there year-.....»»
Multiple dinosaur species not only lived in the Arctic, they also nested there
In the 1950s, researchers made the first unexpected discoveries of dinosaur remains at frigid polar latitudes. Now, researchers reporting in the journal Current Biology on June 24 have uncovered the first convincing evidence that several species of d.....»»
New findings on body axis formation
In the animal kingdom, specific growth factors control body axis development. These signaling molecules are produced by a small group of cells at one end of the embryo to be distributed in a graded fashion toward the opposite pole. Through this proce.....»»
How do developing spinal cords choose "heads" or "tails"?
The progression from a round ball of cells to an embryo with a head and a tail is one of the most critical steps in an organism's development. But just how cells first start organizing themselves with directionality along this head-to-tail axis is ha.....»»
Profiling gene expression in plant embryos, one nucleus at a time
Following fertilization, early plant embryos arise through a rapid initial diversification of their component cell types. As a result, this series of coordinated cell divisions rapidly sculpts the embryo's body plan. The developmental phenomenon in q.....»»
Study identifies trigger for "head-to-tail" axis development in human embryo
Scientists have identified key molecular events in the developing human embryo between days 7 and 14—one of the most mysterious, yet critical, stages of our development......»»
The most ancient ice in the Alps will be preserved in Antarctica
The Ice Memory international mission on Monte Rosa has been accomplished. After working for five days at 4,500 meters in the accumulation zone of the Grenzgletscher, the glacier saddle of Colle Gnifetti, scientists extracted three shallow ice cores (.....»»