It sounds like a "Just So Story"—"How the Insect Got its Wings"—but it's really a mystery that has puzzled biologists for over a century. Intriguing and competing theories of insect wing evolution have emerged in recent ...
Plants & Animals
Dec 1, 2020
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195
Over the past 530 million years, the vertebrate lineage branched out from a primitive jawless fish wriggling through Cambrian seas to encompass all the diverse forms of fish, birds, reptiles, amphibians, and mammals. Now ...
Biotechnology
Aug 18, 2011
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0
When zebrafish lack a specific protein, the two hemispheres of the brain develop symmetrically, and the sleep hormone melatonin is not produced. These results were recently published by Freiburg biologists Theresa Schredelseker ...
Cell & Microbiology
Jul 4, 2018
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6
In a paper in Science this week, Penn researchers report the first detailed molecular characterization of how every cell changes during animal embryonic development. The work, led by the laboratories of Perelman School of ...
Molecular & Computational biology
Sep 5, 2019
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331
A new study in Science from Karolinska Institutet maps out how different DNA-binding proteins in human cells react to certain biochemical modifications of the DNA molecule. The scientists report that some 'master' regulatory ...
Biotechnology
May 4, 2017
8
288
Biologists at UC San Diego have identified the specific region in vertebrates where adult blood stem cells arise during embryonic development.
Cell & Microbiology
Feb 14, 2010
1
0
Researchers at Karolinska Institutet and the Ludwig Cancer Research in Stockholm, Sweden have conducted a detailed molecular analysis of the embryo's first week of development. Their results show that there are considerable ...
Cell & Microbiology
Apr 7, 2016
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96
Researchers have created synthetic human embryos using stem cells, according to media reports. Remarkably, these embryos have reportedly been created from embryonic stem cells, meaning they do not require sperm and ova.
Cell & Microbiology
Jun 16, 2023
1
43
(PhysOrg.com) -- Expectant human parents might wish for a boy or girl, but Hessian flies actually have a third option, and, no matter what, the flies are never surprised by the sex of their offspring.
Biotechnology
Mar 30, 2010
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0
Thane Wibbels, Ph.D., professor of biology in the University of Alabama at Birmingham College of Arts and Sciences, used to go out in the wild to catch turtles.
Plants & Animals
Jan 9, 2015
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