The genetic toolkit that animals use to build fins and limbs is the same genetic toolkit that controls the development of part of the gill skeleton in sharks, according to research to be published in Proceedings of the National ...
Evolution
Mar 23, 2009
0
1
When a child falls off her bike and scrapes her knee, skin stem cells rush to the rescue, growing new epidermis to cover the wound. But only some of the stem cells that will ultimately patch her up are normally dedicated ...
Cell & Microbiology
Mar 7, 2024
0
114
The sea lamprey, a 500-million-year-old animal with a sharp-toothed suction cup for a mouth, is the thing of nightmares. A new study from the Stowers Institute for Medical Research discovered that the hindbrain—the part ...
Evolution
Feb 21, 2024
0
21
The Dark Energy Survey took an entire decade to produce a value for the cosmological constant—and it's smaller than you might think! There were other stories as well, including one about primeval black holes, and because ...
Scientists have known that sex-determination in vertebrates happens in the germ cells, a body's reproductive cells, and the somatic cells, the cells that are not reproductive cells. Yet they have not fully understood the ...
Plants & Animals
Sep 9, 2022
0
72
Blood-forming stem cells found in bone marrow are the life-saving component used in bone marrow transplants. However, suitable donors cannot be found in many cases. A new study reveals how the human embryo develops the precursor ...
Cell & Microbiology
Apr 28, 2022
0
67
The colonization of the seafloor is one of the most important events in evolutionary history, leading to an explosive radiation and large-scale morphological diversification of marine phyla. Flatfishes are one of the most ...
Evolution
Apr 26, 2021
0
253
They occur in nature, are reactive and play a role in many biological processes: polyenes. It is no wonder that chemists have for a long time been interested in efficiently constructing these compounds—not least in order ...
Biochemistry
Jul 16, 2020
0
115
Meiosis is essential to sexual reproduction. For almost 15 years, it has been commonly held that retinoic acid, a molecule derived from vitamin A, triggers meiosis in mammalian germ cells. Yet, in joint articles published ...
Cell & Microbiology
May 22, 2020
0
177
A team of researchers at Tufts University School of Medicine developed a method to grow and maintain olfactory stem cells in culture, which can then be used to restore tissue in the nose. The discovery raises hope that future ...
Biochemistry
Mar 28, 2019
1
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