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E.g., 08/20/2019
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  • hydra
  • pond snails
  • sperm
Your search has returned 124 articles:
  • Science Visualized

    Mapping how the ‘immortal’ hydra regrows cells may demystify regeneration

    Hydras seem to have found the fountain of youth, perpetually renewing their cells and regrowing damaged body parts. The tiny tubelike creatures, with a tentacle-ringed mouth and a sticky foot, can regrow their entire bodies from just a scrap of tissue.

    These freshwater invertebrates’ regenerative superpowers hinge on three groups of stem cells that develop into specific cells of the...

    07/26/2019 - 12:14 Cells, Development, Animals
  • News

    Tweaking one gene with CRISPR switched the way a snail shell spirals

    A genetic spin doctor sets snail shells to swirl clockwise, new research confirms. And the twist in this story comes at the beginning — when snail embryos are just single cells.

    Though most pond snails (Lymnaea stagnalis) have shells that coil clockwise, a few have taken a left turn, curling counterclockwise. Researchers had strong evidence that a mutation in a gene called Lsdia1 caused...

    05/14/2019 - 07:00 Genetics, Development, Animals
  • News

    Slow sperm may fail at crashing ‘gates’ on their way to an egg

    The female reproductive tract is an obstacle course that favors agile sperm. Narrow straits in parts of the tract act like gates, helping prevent slower-swimming sperm from ever reaching an egg, a study suggests. 

    Using a device that mimics the tract’s variable width, researchers studied sperm behavior at a narrow point, where the sex cells faced strong head-on currents of fluid. The...

    02/13/2019 - 14:49 Development
  • News in Brief

    A protein in mosquito eggshells could be the insects’ Achilles’ heel

    Mosquito researchers may have hatched a new plan to control the bloodsuckers: Break their eggshells.

    A protein called eggshell organizing factor 1, or EOF1, is necessary for some mosquito species’ eggs and embryos to develop properly, a new study finds. Genetically disrupting production of that protein in Aedes aegypti mosquitoes caused about 60 percent of their normally dark eggshells...

    01/08/2019 - 14:00 Animals, Genetics, Development
  • News

    Gene editing creates mice with two biological dads for the first time

    For the first time, researchers have created mice with two dads. No female contributed to the rodents’ genetic makeup.

    This unusual reproduction took place in a lab where researchers gathered fathers’ stem cells, and used them to produce embryos that were implanted into surrogate mothers. The technique required scientists to edit the animals’ genes in order for the mice to mature enough...

    10/11/2018 - 12:02 Cells, Development
  • Science Visualized

    See these dazzling images of a growing mouse embryo

    A new microscope is giving researchers an unprecedented view of how mammals are built, cell by cell.

    Light sheet microscopes use ultrathin laser beams to illuminate sections of a specimen while cameras record those lit-up sections. Previous iterations of the device have captured detailed portraits of living zebra fish and fruit fly embryos as they develop. Kate McDole, a developmental...

    10/11/2018 - 11:00 Cells, Development, Animals