Dust grains older than our Sun found in asteroid Ryugu samples

Dust grains older than our Sun found in asteroid Ryugu samples

Washington, DC— Microscopic grains of ancient material that predate our Sun’s birth were found in samples returned from the asteroid Ryugu by the Hayabusa2 mission, according to new work from an international team led by Carnegie’s Jens Barosch and Larry Nittler and published in The Astrophysical Journal Letters. Named after a Japanese folktale, Ryugu is … Read more

Men exposed to industrial air pollution exhibit sperm mitochondrial DNA deletions

Men exposed to industrial air pollution exhibit sperm mitochondrial DNA deletions

In eukaryotic cells, mitochondria produce energy that is used for all cellular functions. Two metabolic pathways that influence energy production include oxidative phosphorylation and glycolysis. All cells consist of varied numbers of mitochondria, which ranges from several hundred to thousands per cell. Every mitochondrion contains multiple copies of mitochondrial DNA (mtDNA). Study: Spectrum of sperm … Read more

Researchers develop new kind of Atomic Force Microscopy probes in true 3D shapes

Researchers develop new kind of Atomic Force Microscopy probes in true 3D shapes

A team of researchers from NYU Abu Dhabi’s Advanced Microfluidics and Microdevices Laboratory (AMMLab) have developed new kind of Atomic Force Microscopy (AFM) probes in true three-dimensional shapes they call 3DTIPs. AFM technology allows scientists to observe, measure, and manipulate samples and micro and nanoscale entities with unprecedented precision. The new 3DTIPs, which are manufactured … Read more

JWST to reveal chemistry of ancient galaxies, is taking data for first of six Carnegie-led projects

JWST to reveal chemistry of ancient galaxies, is taking data for first of six Carnegie-led projects

Pasadena, CA— The first of six projects led by Carnegie-affiliated astronomers will, for the next three days, use the James Webb Space Telescope to make some of the most-accurate measurements ever taken of the chemistry of very early galaxies—studying light that traveled 10 billion years to reach us. Carnegie’s Gwen Rudie and Allison Strom, formerly … Read more

Building Blocks of RNA Spotted at the Center of the Milky Way

Building Blocks of RNA Spotted at the Center of the Milky Way

A team of researchers say they’ve found some building blocks of RNA in a molecular cloud close to the center of the Milky Way. The discovery has implications for theories about how life began on Earth—and perhaps elsewhere. The molecular cloud is named G+0.693-0.027. The team of astrophysicists, astrobiologists, and chemists conducted a survey of … Read more

Dogs Could Have Joined Humans More Than Once, Ancient Wolf DNA Has Revealed

Dogs Could Have Joined Humans More Than Once, Ancient Wolf DNA Has Revealed

The beloved pooch snoring on your couch or sticking a snoot under your arm at dinner time came from a much wilder origin. At some point, dogs diverged from gray wolves under the guidance of domestication, to become the diverse fuzzbutts that fill our homes and hearts with such joy today. Exactly when and how … Read more

New analysis sheds light on diversity and ecological footprint of marine RNA viruses

New analysis sheds light on diversity and ecological footprint of marine RNA viruses

Community- and “species”-level analysis on Global Ocean RNA sequences sampled from waters worldwide has shed light on the poorly understood diversity and ecological footprint of marine RNA viruses, according to a new report. The findings underscore the important roles marine RNA viruses play in the ocean ecosystem. Viruses are ubiquitous in all domains of life … Read more

Study offers recommendations for improving statistical inference in population genomics

Study offers recommendations for improving statistical inference in population genomics

The second century Alexandrian astronomer and mathematician Claudius Ptolemy had a grand ambition. Hoping to make sense of the motion of stars and the paths of planets, he published a magisterial treatise on the subject, known as the Almagest. Ptolemy created a complex mathematical model of the universe that seemed to recapitulate the movements of … Read more

Digging Deep: Is genetic recombination linked to expression of harmful traits?

Digging Deep: Is genetic recombination linked to expression of harmful traits?

Most mammals, including humans, are diploid. That is, nuclear DNA (nrDNA) exists as pairs of chromosomes (humans have 23 pairs of chromosomes, while mice have 20). This pair of chromosomes are homologous, in that the sequence of genes on both the chromosomes is the same. However, a gene that sits on a particular address (‘locus’) … Read more

NASA scientists find evidence that Life on Earth may have come from an asteroid

NASA scientists find evidence that Life on Earth may have come from an asteroid

NASA scientists along with researchers from Japan have found a crucial link between life on Earth and asteroids while studying the five components of DNA and RNA. Find out what the study has revealed. NASA: There has always been that one question in the corner of our mind, how did life begin on Earth? It … Read more