Showing 20 articles starting at article 681

< Previous 20 articles        Next 20 articles >

Categories: Biology: Developmental, Paleontology: Climate

Return to the site home page

     (via sciencedaily.com)     Original source 

There is currently less sea ice in the Antarctic than at any time in the forty years since the beginning of satellite observation: in early February 2023, only 2.20 million square kilometers of the Southern Ocean were covered with sea ice.

     (via sciencedaily.com)     Original source 

Researchers have pinpointed two intervals when ice and ocean conditions would have been favorable to support early human migration from Asia to North America late in the last ice age, a new paper shows.

     (via sciencedaily.com) 

Rocks, rain and carbon dioxide help control Earth's climate over thousands of years -- like a thermostat -- through a process called weathering. A new study may improve our understanding of how this thermostat responds as temperatures change.

     (via sciencedaily.com) 

Researchers show that brain organoids -- clumps of lab-grown neurons -- can integrate with rat brains and respond to visual stimulation like flashing lights.

     (via sciencedaily.com) 

Data stored in ice cores dating back 55 years bring new insight into atmospheric levels of a molecule that can significantly affect weather and climate.

     (via sciencedaily.com) 

A new biomaterial that can be injected intravenously, reduces inflammation in tissue and promotes cell and tissue repair. The biomaterial was tested and proven effective in treating tissue damage caused by heart attacks in both rodent and large animal models. Researchers also provided proof of concept in a rodent model that the biomaterial could be beneficial to patients with traumatic brain injury and pulmonary arterial hypertension.

     (via sciencedaily.com) 

A new species of microalgae was found in water from a home aquarium. While analyzing DNA samples taken from the algae, researchers discovered Medakamo hakoo, whose DNA sequence didn't match any on record. This new species is the smallest known freshwater green algae, with inherent qualities which enable it to be cultured stably at high density, meaning it could be effectively used to produce useful products for food and industry.

     (via sciencedaily.com) 

Scientists are working to understand the cause and how the events of the LPME unfolded by focusing on mercury from Siberian volcanoes that ended up in sediments in Australia and South Africa.

     (via sciencedaily.com) 

Scientists have created an AI system capable of generating artificial enzymes from scratch. In laboratory tests, some of these enzymes worked as well as those found in nature, even when their artificially generated amino acid sequences diverged significantly from any known natural protein.

     (via sciencedaily.com) 

In a new study, researchers have managed to curb skin cancer. The study was conducted on artificial human skin.

     (via sciencedaily.com) 

Scientists have used radiocarbon ages (kill dates) of previously ice-entombed dead black mosses to reveal that glaciers advanced during three distinct phases in the northern Antarctic Peninsula over the past 1,500 years.

     (via sciencedaily.com) 

Scientists used the auxin-inducible degron 2 system on CTCF, bringing the novel approach to bear on a fundamental protein.

     (via sciencedaily.com) 

Researchers uncover for the first time the mechanism that likely explains how embryos form either a larva or a miniature version of the adult.

     (via sciencedaily.com) 

What drives crocodile evolution? Is climate a major factor or changes in sea levels? Determined to find answers to these questions, researchers discovered that while changing temperatures and rainfall had little impact on the crocodiles' gene flow over the past three million years, changes to sea levels during the Ice Age had a different effect.

     (via sciencedaily.com) 

The transport of molecules along the cell's skeleton plays a role in cancer metastasis, researchers show.

     (via sciencedaily.com) 

A protein that prepares DNA for replication also prevents the replication process from running out of control, according to a new study. The work solves a mystery that has long puzzled biologists.

     (via sciencedaily.com) 

Under cold conditions, not only the mother plant but also the father plant can pass on its chloroplasts to the offspring.

     (via sciencedaily.com) 

Scientists succeed in boosting the efficiency of CRISPR/Cas9 and related methods and modifying initially inaccessible DNA sequences. They fine-tuned these tools to enable effective genetic screening for modelling specific gene mutations.

     (via sciencedaily.com) 

Immunogeneticists have discovered a new genetic disorder that causes immunodeficiency and profound susceptibility to opportunistic infections including a life-threatening fungal pneumonia.

     (via sciencedaily.com) 

The red junglefowl -- the wild ancestor of the chicken -- is losing its genetic diversity by interbreeding with domesticated birds, according to a new study.