Reproduction

Team Cracks Eggs for Science

Champaign, IL — Avian brood parasites lay their eggs in the nests of other bird species, forcing the hosts to do the hard work of raising the unrelated young. A team of scientists wanted to simulate...

How Sperm Remember

Montreal, Canada — It has long been understood that a parent’s DNA is the principal determinant of health and disease in offspring. Yet inheritance via DNA is only part of the story; a father’s...

Study Reveals How Egg Cells Get so Big

Cambridge, MA — Egg cells are by far the largest cells produced by most organisms. In humans, they are several times larger than a typical body cell and about 10,000 times larger than sperm cells. There’s...

Plastic contaminants harm sea urchins

Exeter, UK — Plastics in the ocean can release chemicals that cause deformities in sea urchin larvae, new research shows. Scientists soaked various plastic samples in seawater then removed the plastic...

Becoming Nerve Cell: Timing is of the Essence

Ghent, Belgium — Mitochondria are small organelles that provide the energy critical for each cell in our body, in particular in the high fuel-consuming brain. In this week’s edition of Science,...

Cell Diversity in the Embryo

Munich, Germany — A research team at the Max Planck Institute for Molecular Genetics in Berlin has explored the role of factors in embryonic development that do not alter the sequence of DNA, but only...

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