After the egg has been fertilized by a sperm, the surrounding egg coat tightens, mechanically preventing the entry of additional sperm and the ensuing death of the embryo. This is according to a new study led by researchers ...
Cell & Microbiology
Mar 14, 2024
0
5
During warm periods in Earth's history, known as interglacials, glaciers the size of continents pulled back to reveal new landscapes. These were new worlds for early humans to explore and exploit, and 1.4 million years ago ...
Archaeology
Mar 10, 2024
2
3655
One in seven species of deepwater sharks and rays are threatened with extinction due to overfishing, according to a new eight-year study released today in the journal Science.
Plants & Animals
Mar 7, 2024
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49
Indian astronomers have conducted long-term X-ray observations of a nearby ultra-fast rotating active star known as AB Doradus A. Results of the observational campaign, published February 29 on the pre-print server arXiv, ...
During the manufacturing process, many medical devices or equipment for use on humans must be sterilized according to recognized standards. This includes gowns, surgical drapes, syringes and implantable medical devices. In ...
General Physics
Mar 4, 2024
0
1
Correcting 50-year-old errors in the math used to understand how electromagnetic waves scatter electrons trapped in Earth's magnetic fields will lead to better protection for technology in space.
Space Exploration
Mar 4, 2024
0
1470
Using NASA's Chandra X-ray spacecraft, astronomers have inspected a potential super-star cluster, designated HSO BMHERICC J72.971176-69.391112, or H72.97−69.39 for short. The new observations resulted in the detection of ...
The sunlight received by Earth is a mixed bag of wavelengths ranging from ultraviolet to visible to infrared. Each wavelength carries inherent energy that, if effectively harnessed, holds great potential to facilitate solar ...
Nanophysics
Feb 27, 2024
0
22
Just over five years ago, on 22 February 2019, an unmanned space probe was placed in orbit around the moon. Named Beresheet and built by SpaceIL and Israel Aerospace Industries, it was intended to be the first private spacecraft ...
Space Exploration
Feb 27, 2024
0
20
Researchers at the University of California, Irvine have discovered profound similarities and surprising differences between humans and insects in the production of the critical light-absorbing molecule of the retina, 11-cis-retinal, ...
Biochemistry
Feb 22, 2024
0
60
