Search results for histological studies

Bio & Medicine Feb 10, 2023

Autofluorescence-free, imaging-guided precision therapy for rheumatoid arthritis

Rheumatoid arthritis (RA), known as "immortal cancer," is a chronic, progressive autoimmune inflammatory disease. The development and application of an RA high-sensitivity theranostics probe can help to accurately monitor ...

Paleontology & Fossils Jan 4, 2023

Putting the bones of giant, extinct 'thunderbirds' under the microscope reveals how they grew

The largest flightless bird found anywhere in the world today is the ostrich. It stands about 2.5 metres tall and can weigh up to 240kg. But millions of years ago ostriches would have been dwarfed by several other flightless ...

Evolution Dec 22, 2022

A bone cancer tumor more than 215 million years old

More than 215 million years ago, a large amphibian species lived in floodplains in southwestern Poland: Metoposaurus krasiejowensis. On one of these fossils, Polish and American scientists, with the participation of researchers ...

Analytical Chemistry Dec 21, 2022

Neutron experiments reveal what maintains good function in bones

Around 500 million years ago, early vertebrates in the seas became fish, adopting an inner skeleton and a flexible spine based on a nanocomposite of fibers and mineral, known as bone material. This "invention" of evolution ...

Paleontology & Fossils Nov 28, 2022

Cracking open a fossil bone reveals rapid juvenile growth in early tetrapods

The rise of tetrapods (four-limbed vertebrates) is one of the iconic evolutionary transitions preserved in the fossil record. These animals, which lived about 385 to 320 million years ago during the Devonian and Carboniferous ...

Plants & Animals Nov 15, 2022

New critical period of embryonic sex determination in sea turtles identified

Unlike humans, turtles, lizards and other reptiles—such as crocodiles—do not have sex chromosomes. Their sex is determined based on the environment, which makes them especially vulnerable to climate change. An increase ...

Plants & Animals Oct 20, 2022

3D techniques shed light on what makes a bird's lungs so efficient

Birds are profoundly important animals. As predators, pollinators, seed dispersers, scavengers and ecosystem bioengineers, the world's 11,000 species of birds play critical roles in the food chain and therefore the existence ...

Evolution Sep 6, 2022

Dental evidence challenges origin time of mammals

New research published in the Journal of Anatomy has used dental evidence to challenge the origin time of mammals.

Evolution Sep 2, 2022

Molecular atlas of an Australian dragon's brain sheds new light on more than 300 million years of brain evolution

These days, dragons are keeping "Game of Thrones" fans on their toes. But they are also providing important insights into vertebrate brain evolution, as revealed by the work of Max Planck scientists on the brain of the Australian ...

Cell & Microbiology Aug 29, 2022

Epigenetic control of transcriptional stability maintains identity and function in dopaminergic and serotonergic neurons

A new study from researchers at Karolinska Institutet published in Science Advances show that inactivation of a protein complex that controls gene repression leads to loss of neuronal identity of dopamine-producing cells ...

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