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PREP07 Test 1 OG17 OG18 OG19 OG20 OG2022
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In the major cities of industrialized countries at the end of the nineteenth century, important public places such as theaters, restaurants, shops, and banks had installed electric lighting, but electricity was in less than one percent of homes, where lighting was still provided mainly by candles or gas.
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OG16 OG17 OG18 OG19 OG20 OG2022
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By 1999, astronomers had discovered 17 nearby stars that are orbited by planets about the size of Jupiter.
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OG16 OG17 OG18 OG19 OG20 OG2022
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Although she was considered among her contemporaries to be the better poet than her husband, later Elizabeth Barrett Browning was overshadowed by his success.
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OG12 OG15 OG16 OG17 GWD PREP08 Test 1 OG18 OG19 OG20 OG2022
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In no other historical sighting did Halley's Comet cause such a worldwide sensation as did its return in 1910–1911.
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OG12 OG15 OG16 OG17 GWD PREP08 Test 2 OG18 OG19 OG20 OG2022
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Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.
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