Lifeboat Foundation

The motion of a tiny number of charged particles may solve a longstanding mystery about thin gas disks rotating around young stars, according to a new study from Caltech.

These features, called accretion disks, last tens of millions of years and are an early phase of solar system evolution. They contain a small fraction of the mass of the star around which they swirl; imagine a Saturn-like ring as big as the solar system. They are called accretion disks because the gas in these disks spirals slowly inward toward the star.

Continue reading “Why does inside of solar system not spin faster? Old mystery has possible new solution” »

NLM’s NCBI is introducing the Comparative Genome Viewer (CGV), an easy-to-use visualization tool that helps you quickly compare eukaryotic genome assemblies and easily identify genomic changes that may be significant to biology and evolution. With the new CGV you can view and compare the alignment between two assemblies to see differences in genomic sequence and structure, including deletions, inversions, and translocations. Currently, you can compare assemblies from over 50 annotated animal and plant genomes.

In a trio of studies published on June 27 in the journal Nature Microbiology 0, researchers at The University of Texas at Austin have discovered “fingerprints” of mysterious viruses hidden in an ancient group of microbes that may include the ancestors of all complex life on Earth: from fungi to plants to humans.

Ths discovery is significant; it explores the hypothesis that viruses were imperative to the evolution of humans and other complex life forms.

These microbes – known as Asgard archaea after the abode of the gods in Norse mythology – are usually found in the frigid sediments deep in the ocean and in boiling springs, and existed on Earth before the first eukaryotic cells, which carry their DNA inside a nucleus.

Cosmologist, noted author, Astronomer Royal and recipient of the 2015 Nierenberg Prize for Science in the Public Interest Lord Martin Rees delivers a thought-provoking and insightful perspective on the challenges humanity faces in the future beyond 2050. [3/2016] [Show ID: 30476]

Frontiers of Knowledge.
(https://www.uctv.tv/frontiers-of-knowledge)

Continue reading “Looking Beyond 2050 — On Earth and in Space with Lord Martin Rees” »

Researchers at North Carolina State University show that an important gene in maize called HPC1 modulates certain chemical processes that contribute to flowering time, and has its origins in “teosinte mexicana,” a precursor to modern-day corn that grows wild in the highlands of Mexico. The findings provide insight into plant evolution and trait selection, and could have implications for corn and other crops’ adaptation to low temperatures.

“We are broadly interested in understanding how natural variation of lipids are involved in the growth and development of plants, and how these compounds may help plants adapt to their immediate environments,” said Rubén Rellán-Álvarez, assistant professor of structural and molecular biochemistry at NC State and the corresponding author of a paper describing the research. “Specifically, we wanted to learn more about variation in lipids called phospholipids, which consist of phosphorus and fatty acids, and their role in adaptation to cold, low phosphorus, and the regulation of important processes for plant fitness and yield like flowering time.”

Maize grown at higher altitudes, like the highlands of Mexico, needs special accommodations in order to grow successfully. The colder temperatures in these mountainous regions put maize at a slight disadvantage when compared with maize grown at lower elevations and higher temperatures.

New research suggests that Darwinian evolution could be happening up to four times faster than previously thought, based on an analysis of genetic variation.

The more genetic differences there are in a species, the faster evolution can happen, as certain traits die off and stronger ones get established. The team behind this latest study calls it the “fuel of evolution”, and they looked at data on 19 different wild animal groups around the world.

That data analysis revealed this raw material for evolution is more abundant than earlier estimates, and as a result we may have to adjust our expectations for how quickly animals evolve – a pertinent question in our age of climate change.

The ability to change your mind is a key part of being a social creature. Reasoning by oneself is a shallow endeavor.

The gene-editing technology has led to innovations in medicine, evolution and agriculture — and raised profound ethical questions about altering human DNA.

The monkeypox virus has mutated at a far faster rate than would normally be expected and likely underwent a period of “accelerated evolution,” a new study suggests.

The virus, which has infected more than 3,500 people in 48 countries since its detection outside Africa in May, may be more infectious due to dozens of new mutations. In all, the virus carries 50 new mutations not seen in previous strains detected from 2018 to 2019, according to a new study published June 24 in the journal Nature Medicine.

Scientists usually don’t expect viruses like monkeypox to gain more than one or two mutations each year, the study authors noted.