Phone 'sexting': Give teenagers a convenient way to send pictures to each other, and, by darn, they're gonna send naughty ones. Schools in Farmington have repeatedly caught students exchanging photos of their genitals and other body parts on their cell phones. It just had to happen. But in Davis County, bastion of clean living? Yep. And it's likely to happen in other parts of Utah, where comprehensive sex education is forbidden. What's the saying about forbidden fruit? The county attorney will have to decide whether this is a crime worth prosecuting, or simply high-tech adolescent hijinks. But it seems clear the schools cannot be blamed. If parents are upset about this form of communication, they should take responsibility and take the phones.

Telling all: It's too late to be of much help to people who have spent hundreds of thousands of dollars on a home on Traverse Mountain. But Draper city officials will soon post a marker, showing where the area's geologic hazards earthquake faults, landslides, debris flows and falling rocks are located. Though the marker won't be popular with homeowners wanting to sell and developers wanting to put more houses on unstable ground, it should be helpful to those who haven't yet invested in property on a moving mountain.

Polar express: The ride on University Line TRAX trains can be chilly. The reason is that 29 of Utah Transit Authority's 69 TRAX cars are virtually unheated. The refrigerator cars were purchased from San Jose, Calif., where heat isn't an issue. Fifteen currently are being refurbished, and UTA promises that all will be toasty by next winter. Until then, blow on your fingers.