Extract two new facts from the following text.

Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. They are an informal grouping within the infraorder Cetacea, which usually excludes dolphins and porpoises. Whales, dolphins and porpoises belong to the order Cetartiodactyla, which consists of even-toed ungulates.
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1. Whales, dolphins, and porpoises all belong to the same order, Cetartiodactyla. 
2. Whales are informal groupings within Cetacea, which usually excludes dolphins and porpoises.
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