To discover why Neandertals are most closely related to people outside Africa, Harvard and Max Planck Institute scientists have estimated the date when Neandertals and modern Europeans last shared ancestors. The research, ...
Archaeology
Oct 4, 2012
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5
Researchers reporting in the April 27 issue of the journal Cell have devised a new and improved method for producing genetically modified animals for use in scientific research. The method relies on haploid embryonic stem ...
Cell & Microbiology
Apr 26, 2012
0
0
(AP) -- A scientific journal has retracted a controversial paper claiming to have created the first human sperm from embryonic stem cells.
Biotechnology
Jul 31, 2009
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0
The past decade has seen an explosion of new research into some of the most fascinating sounds in the sea: the vocalizations of whales and dolphins.
Plants & Animals
May 19, 2024
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32
Studying sex from just the male perspective misses half the experience. But much of what we know about the origins of reproductive cells comes from looking at sperm and egg formation separately—or only focusing on sperm.
Cell & Microbiology
Nov 30, 2023
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1
The study, published in Conservation Physiology, found tuatara sperm are fast moving and a whopping three times longer than human sperm.
Plants & Animals
Sep 19, 2023
0
1
Life existed without human beings for more than 99.9% of Earth's history. Yet we often ignore the achievements of species that preceded us by billions of years.
Plants & Animals
Apr 19, 2023
0
14
Researchers at São Paulo State University (UNESP) in Brazil have studied a protein in sperm and discovered two new targets that can be used in combination to develop male contraceptives. The study also demonstrates the feasibility ...
Cell & Microbiology
Feb 16, 2022
0
14
Sweden was the first country in the world to introduce open-identity sperm donation, whereby adult children are entitled to obtain information about their donors. Researchers at Karolinska Institutet have now explored how ...
Social Sciences
Jun 21, 2021
1
0
Not all species need sperm to fertilize an egg for sexual reproduction. Some species need sperm in order to induce completion of egg nucleus development, but then never use the sperm's DNA. I describe how this self-sexual ...
Plants & Animals
Feb 19, 2021
0
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