The Star is profiling Southern Arizona high school athletes whose seasons were cut short by the coronavirus pandemic. Each high school was asked to nominate an exceptional spring sport athlete who ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of ...

The concept of punctuated equilibrium was, to some, a radical new idea when it was first proposed by Stephen Jay Gould and Niles Eldredge in 1972. Now it is widely recognized as a useful model for one ...

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