We now know that life can exist in much harsher environments than previously___ consequently, it is possible that extraterrestrial life forms live in places once thought uninhabitable.

Vivien Leigh, a famous actress in her own right, was married to film star Laurence Olivier___ the two appeared in numerous movies together.

Alice could spruce up her bedroom by purchasing a new headboard for her bed ___ or making one using fabric stretched over plywood.

"Should I order the lemon cake with pistachio crème for dessert ____ or should I get the strawberry sorbet?" Scarlett asked Christina as she studied the menu.

Every summer, Mrs. Morrison takes a canoe trip down the Seaside River ____ she uses a two-person whitewater canoe to navigate the Class IV rapids.

If people are deprived of REM sleep___ their bodies will adjust by reducing the time spent in other sleep stages—a phenomenon called "REM rebound."

Known for her caustic wit, Dorothy Parker was a prominent writer in the 1920s____ and also an important social activist.

Because singer, songwriter, and music producer Smokey Robinson is credited with four thousand songs and over thirty Top 40 hits for Motown Records____ he is known as the King of Motown.

In the nineteenth century, albumen, or the clear part of the inside of an egg, was an inexpensive material used for photographic development___ so commercial photographers actually kept chickens on-site.

The five most populous cities in the world are located in Asia ____ Tokyo (36.9 million), Shanghai (34 million), Seoul (25.6 million), Guangzhou (25 million), and Beijing (24.9 million).

The Harry Ransom Center in Austin, Texas, collects and preserves an extensive collection of more than thirty-six million manuscripts____ five million photographs ____ and one million rare books—all accessible to the general public.

Symptoms of Lyme disease, a bacterial infection transmitted by a certain type of tick, include_____ a skin rash around the area of the bite, fatigue, chills, fever, and muscle ache.

Some of the most infamous assassins in American history include John Wilkes Booth, assassin of Abraham Lincoln____ Lee Harvey Oswald, accused assassin of President John F. Kennedy____ and James Earl Ray, assassin of Martin Luther King, Jr.

Everyone knows that penguins and ostriches can't fly, but there are several other birds that are also flightless____ the weka, the kiwi, the kakapo, the takahe, and the cassowary.

Parasitic flowering plants like dwarf mistletoe____ the Australian Christmas tree___ and dodder extract water and nutrients from host plants to survive.

The author's upcoming book-signing tour includes stops in Littleton, Colorado____ Santa Fe, New Mexico ____ Phoenix, Arizona_____ and Cheyenne, Wyoming.

About six thousand endangered snow leopards live in the wild, and the largest populations are found in____ China, Mongolia, India, and Kyrgyzstan.

At the first-ever Climate Engineering Conference, geoengineers discussed how gigantic orbiting lasers might be used to fight climate change in three ways____ by breaking down greenhouse gases, by changing weather patterns, and by causing clouds to form.

The skate park features a course that has a full-pipe and an 11.5-foot deep bowl____ a street course that includes stairs, ledges, handrails, and bank___ and a curvilinear skateable entrance with banks and ledges.