The plant family “Cucurbitaceae,” a.k.a. the gourd family, contains about 975 species. Aside from pumpkins, melons, cucumbers ...

A keystone in an arch's crown secures the other stones in place. Keystone species play the same role in many ecological communities by maintaining the structure and integrity of the community.

Just 12 plant species and five types of animal make up 75% of the world's food. At least 30,000 of the 350,000 known plant species on our planet are edible, according to the United Nations' Food ...