This litter of pigs all have the same parents, but look different from their parents and each other.

The sound of a coyote pack can be heard at night. 

Urban rain gardens can help reduce the amount of storm water going through the system and allow more water to infiltrate through the ground.

Engineers use expansion joints to allow bridges to expand and contract in response to temperature fluctuations.

Green roofs are planted in an effort to reduce a variety of environmental impacts.

The water depth and quality of this small farm pond have changed because of soil disposition.

Pella Tulip Time is planned in advance to make sure that tulips are properly prepared and planted, but tulips bloom at different times.

Igneous rocks in the form of granite rocks are all over Iowa, however there are no active volcanoes or active plates.

The Cordova Tower is the tallest observation tower in a public park in the Midwest.

Barred owls are large brown owls and their calls are often heard at dusk and through the night due to their nocturnal behavior.

This series of pictures shows the traits and presence of the prickly pear cactus in different seasons. 

One tree in this forest is not standing upright like the other trees.

Stomata in tulips are important parts of the photosynthesis and cellular respiration processes.

The Iowa Wind and Rock is a physically demanding bicycle race in Iowa.

Animal scat can be examined to determine evolutionary relationships in the animals.

Chloride levels were tested and monitored in several local waterways after the first snow melt to determine street salt impact on local waterways.

Startled fish cause a wave surge as their individual movements constructively interfere.

Icicles on a roof appear to be sideways, rather than perpendicular to the ground.