Savannah Guthrie was named as Matt Lauer's co-anchor on NBC's "Today" show Friday, marking the pinnacle of the Tucson-raised journalist's meteoric rise through the ranks of TV news. Guthrie, 40, ...

Geostationary orbit simulation in GlowScript VPython: a practical tutorial that demonstrates orbital mechanics and physics-based visualization of satellites maintaining a fixed position relative to ...

Dear Eric: My wife and I have been married for more than 40 years. She’s great. But a reoccurring point of friction and, really, anger on my part is over the dishwashing and laundry at our house.