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What Causes Alzheimer’s? Scientists Are Rethinking the Answer.
After decades in the shadow of the reigning model for Alzheimer’s disease, alternative explanations are finally getting the attention they deserve.
Bacteria’s Immune Sensors Reveal a Novel Way to Detect Viruses
A new study reveals that bacteria can fight viruses in a surprisingly elegant way that has no known counterpart in more complex life.
Protein Blobs Linked to Alzheimer’s Affect Aging in All Cells
Protein buildups like those seen around neurons in Alzheimer’s, Parkinson’s and other brain diseases occur in all aging cells, a new study suggests. Learning their significance may reveal new strategies for treating age-related diseases.
Life’s First Peptides May Have Grown on RNA Strands
RNA and peptides coevolving in the primordial world might have jointly served as a precursor to the modern ribosome.
Life With Longer Genetic Codes Seems Possible — but Less Likely
Life could use a more expansive genetic code in theory, but new work shows that improving on three-letter codons would be a challenge.
Peptides on Stardust May Have Provided a Shortcut to Life
The discovery that short peptides can form spontaneously on cosmic dust hints at more of a role for them in the earliest stages of life’s origin, on Earth or elsewhere.
Biologists Rethink the Logic Behind Cells’ Molecular Signals
The molecular signaling systems of complex cells are nothing like simple electronic circuits. The logic governing their operation is riotously complex — but it has advantages.