This month’s featured image is a small asteroid burning up in Earth’s atmosphere, captured by a photographer in the right place at the right time.
Remains of earwig-like insects discovered near village of Chekarda, Russia, covered in pollen.
Experiments in live zebrafish and leeches may one day lead to growing chips in living tissue.
When two forms of hydrogen smash together an unusual process called quantum tunnelling can occur. Researchers have now worked out how rarely it happens.
Poor sleep could lead to between two and seven years worth of heightened heart disease risk and even premature death, according to a new study led by researchers at the University of Sydney in collaboration with Southern Denmark University.
The study analyzed data from more than 300,000 middle-aged adults from the UK Biobank and found that different disturbances to sleep are associated with different durations of compromised cardiovascular health later in life compared to healthy sleepers.
In particular, men with clinical sleep-related breathing disorders lost nearly seven years of cardiovascular disease-free life compared to those without these conditions, and women lost over seven years. Importantly, even general poor sleep, such as insufficient sleep, insomnia complaints, snoring, going to bed late, and daytime sleepiness is associated with a loss of around two years of normal heart health in men and women.
On March 1 and 2, Jupiter and Venus will appear side by side in the night sky in an event called a conjunction, which is visible without a telescope or binoculars.
On Thursday, March 2 at 12:34 a.m. ET (12:34 UTC), Falcon 9 launched Dragon’s sixth operational human spaceflight mission (Crew-6) to the International Space Station from Launch Complex 39A (LC-39A) at NASA’s Kennedy Space Center in Florida. Following stage separation, Falcon 9’s first stage landed on the Just Read the Instructions droneship.
Dragon will autonomously dock with the space station on Friday, March 3 at approximately 12:43 a.m. ET (5:43 UTC). Follow Dragon and the crew’s flight below.
During their time on the orbiting laboratory, the crew will conduct over 200 science experiments and technology demonstrations in areas such as life and physical sciences to advanced materials, technology development, in-space production applications, and even student-led research.
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Imagine a sheet of material just one layer of atoms thick—less than a millionth of a millimeter. While this may sound fantastical, such a material exists: it is called graphene and it is made from carbon atoms in a honeycomb arrangement. First synthesized in 2004 and then soon hailed as a substance with wondrous characteristics, scientists are still working on understanding it.
Postdoc Areg Ghazaryan and Professor Maksym Serbyn at the Institute of Science and Technology Austria (ISTA) together with colleagues Dr. Tobias Holder and Professor Erez Berg from the Weizmann Institute of Science in Israel have been studying graphene for years and have now published their newest findings on its superconducting properties in a research paper in the journal Physical Review B.
“Multilayered graphene has many promising qualities ranging from widely tunable band structure and special optical properties to new forms of superconductivity—meaning being able to conduct electrical current without resistance,” Ghazaryan explains.
The iconic X-shaped organization of metaphase chromosomes is frequently presented in textbooks and other media. The drawings explain in captivating manner that the majority of genetic information is stored in chromosomes, which transmit it to the next generation. “These presentations suggest that the chromosome ultrastructure is well-understood. However, this is not the case,” says Dr. Veit Schubert from IPK’s chromosome structure and function research group.
Several models have been proposed to describe the higher-order structure of metaphase chromosomes based on data obtained using a range of molecular and microscopy methods. These models are categorized as helical and non-helical. Helical models assume that the chromatin in each sister chromatid at metaphase is arranged as a coil, whereas non-helical models suggest that chromatin is folded within the chromatids without forming a spiral.
The researchers revived the term “chromonema,” which was used for the first time at the beginning of the 20th century. Now, the IPK and IEB researchers provided a detailed description of its ultrastructure. Different experimental approaches, including chromosome conformation capture sequencing (Hi-C) of isolated mitotic chromosomes, polymer modeling, and microscopic observations of sister chromatid exchanges and oligo-FISH labeled regions at the super-resolution level provided an independent proof for the coiling of the chromonema.