If you live in Yellowstone National Park, you pretty much know what you signed up for, but this woman got delightful video of a bison herd marching through her town. Watch this video to see the massive creatures on the move, and see how one took full advantage of a scratching post.

A congested atmospheric pattern known as an "omega block" is expected to set up across the country by late this weekend. The jet stream will flow like the Greek letter omega from California to New York with a variety of weather effects, including an upside-down temperature pattern. Highs in the Midwest could be similar to temperatures in the South early next week. Cooler weather and even some May snow will nestle into the Rockies, while rainy or stormy weather will anchor into the Plains and Northeast on either side of the pattern. Spotty flooding may also be possible in the Plains or Northeast due to the sluggish nature of this pattern.

We're watching for early signals ahead of hurricane season to know how much activity is expected this year. Here's how water temperatures might shift activity later this season.

Weather whiplash has been plaguing much of the world recently, and now there’s scientific proof. A study found that sudden, drastic temperature changes are becoming faster, more frequent and more intense. A changing climate and shifting global circulation patterns are all driving the change.

Some hotel guests on a remote Arctic island in the Norwegian archipelago of Svalbard recorded the jaw-dropping moment a man was chased by a polar bear. See how the chase started and you’ll learn why tourists are advised to never travel without a local guide.