Anyone who's been through a high-school algebra class surely remembers using a TI graphing calculator. But who had a calculator like this one? Apple started the trend with the rose gold iPhone, and ...

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Enter your monthly income after taxes into this free budget calculator to create a budget that accounts for your needs, wants and savings goals. Many, or all, of the products featured on this page are ...

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. Travel involves two main expenditures of energy: fighting gravity and propelling ...