As both Wisconsin Supreme Court candidates, Justice Rebecca Bradley and challenger JoAnne Kloppenburg, head toward the April 5 election, their campaigns and two outside groups are spending heavily to attract votes.

When John F. Kennedy was making his ultimately successful pitch for the Democratic Party nomination in 1960, Wisconsin's April 5 primary was considered early. New Hampshire's was first, but candidates treated Wisconsin's as the first significant showdown.

Elizabethkingia continues to challenge epidemiologists as it afflicts people scattered throughout southern and eastern Wisconsin. It's a type of gram-negative bacteria found commonly in the environment, but only rarely causes disease in humans.

U.S. farmers embraced nitrogen-based fertilizer at a dramatic pace during the 1960s and '70s. Since then, its use has played a key role in boosting agricultural productivity. But as a consequence, nitrogen's more soluble form, nitrate, has become a common drinking water contaminant, in Wisconsin and around the country.