Kenneth Loren Beattie of The Woodlands, Texas, has received US Patent Number 6,426,183, “Oligonucleotide microarrays: direct covalent attachment to glass.” The invention provides an improved method for stably attaching a compound, in particular one with at least one amine and hydroxyl group, to a silaceous or silane-containing substrate, in particular glass, porous silica, or oxidized silicon. The method is especially useful attaching nucleic acid sequences, e.g.

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23andMe's Anne Wojcicki ponders DNA and what it means to be human in a New York Times essay.

A new estimate places the last universal common ancestor to life on Earth as living 3.9 billion years ago, Inverse reports.

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