Featured series 
Tag: Embryo
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Nation & World
How cells sort themselves
Researchers have discovered a key control mechanism that cells use to self-organize in early embryonic development.
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Nation & World
Updating embryo research guidelines
Scientists and ethicists gathered at Harvard Law School to discuss the ethics of human embryo experimentation and whether a two-week developmental time limit on their use is appropriate any longer.
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Nation & World
New view of germ cells
Cassandra Extavour is the author of a new study that points to a different mechanism as an ancestral process for specifying germ cells.
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Nation & World
The divergent skull
New work by Harvard scientists challenges long-standing ideas on skull development in vertebrates.
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Nation & World
‘On’ switches for cells
Scientists at Harvard have identified a previously unknown embryonic signal, dubbed Toddler, that instructs cells to move and reorganize themselves, through a process known as gastrulation, into three layers.
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Nation & World
Turing was right
Researchers at Harvard have shown that Nodal and Lefty — two proteins linked to the regulation of asymmetry in vertebrates and the development of precursor cells for internal organs — fit a mathematical model first described by Alan Turing six decades ago.
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Nation & World
Stem cell lessons
Five years after first gaining institutional permission to attempt to produce stem cell lines via somatic cell nuclear transfer (SCNT), two Harvard researchers and a former Harvard postdoctoral fellow have closed the loop with a flurry of new studies and a commentary in several leading journals.
