According to public health officials, in 1998 Massachusetts became the first state in which more babies were born to women over the age of thirty than under it.

Were it not for the fusion-powered heat and radiation that rush from its core, instead its own weight would cause a star to collapse.

A new hair-growth drug is being sold for three times the price, per milligram, as the drug's maker charges for another product with the same active ingredient.

Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve metropolitan Boston.

The 32 species that make up the dolphin family are closely related to whales and in fact include the animal known as the killer whale, which can grow to be 30 feet long and is famous for its aggressive hunting pods.

A mixture of poems and short fiction, Jean Toomer's Cane has been called one of the three best novels ever written by Black Americans—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man.

The Industrial Revolution, making it possible to mass-produce manufactured goods, was marked by their use of new machines, new energy sources, and new basic materials.

Prospecting for gold during the California gold rush was a relatively easy task, because of erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach for anybody with a pan or shovel.

The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.

The globalization of financial-services companies has been a boon to money launderers, because of allowing money placed in a bank in a less regulated jurisdiction to be transferred to a branch in a more regulated one.