For centuries, pi was treated as a familiar constant — useful, predictable, and mostly taken for granted. This video explains the discovery that forced mathematicians to rethink what pi actually is ...

In 2017, I wrote a column about factors that contribute to an accurate retirement estimate that I think is worth repeating this week. I have been learning about employees who have had to retire with ...

Solid oxide fuel cells can generate electrical energy with electrical efficiency exceeding 50% and reduce pollutant emissions, particularly, when the fuel is hydrogen. They have numerous applications, ...