Two types of iconic sequoia trees have grown tall and strong in a surprising place: Michigan. One was believed to be extinct less than 100 years ago. The other is the largest living thing on Earth.

Tulips (Tulipa spp.) in bloom are one of the highlights of a springtime garden. Since the "tulip mania" of seventeenth-century Holland, when a few prized bulbs could cost you a whole year's wages, ...