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Does Having Kids Make Mothers Age Faster?
Evidence is stacking up on both sides of an age-old debate.
When Neurology Becomes Theology
A neurologist’s perspective on research into consciousness.
The Multiverse of 1686
Speculation on multiple universes goes back farther than you might think.
The Impossible Mathematics of the Real World
Near-miss math provides exact representations of almost-right answers.
The Crisis of the Multiverse
In an infinite multiverse, physics loses its ability to make predictions.



