Fat bacteria? Skinny bacteria? From our perspective on high, they all seem to be about the same size. In fact, they are.
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Precisely why has been an open question, according to Rice University chemist Anatoly Kolomeisky, who now has a theory.
A primal mechanism in bacteria that keeps them in their personal Goldilocks zones — that is, just right — appears to depend on two random means of regulation, growth and division, that cancel each other out. The same mechanism may give researchers a new perspective on disease, including cancer.
The “minimal model” by Kolomeisky, Rice postdoctoral researcher and lead author Hamid Teimouri and Rupsha Mukherjee, a former research assistant at Rice now at the Indian Institute of Technology Gandhinagar, appears in the American Chemical Society’s Journal of Physical Chemistry Letters.
“Everywhere we see bacteria, they more or less have the same sizes and shapes,” Kolomeisky said. “It’s the
When a baby reaches for one stuffed animal in a room filled with others just like it, that seemingly random choice is very bad news for those unpicked toys: the baby has likely just decided she doesn’t like what she didn’t choose.
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Though researchers have long known that adults build unconscious biases over a lifetime of making choices between things that are essentially the same, the new Johns Hopkins University finding that even babies engage in this phenomenon demonstrates that this way of justifying choice is intuitive and somehow fundamental to the human experience.
“The act of making a choice changes how we feel about our options,” said co-author Alex Silver, a former Johns Hopkins undergraduate who’s now a graduate student in cognitive psychology at the University of Pittsburgh. “Even infants who are really just at the start of making choices for themselves have this bias.”
The findings are published