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Naturalists are amazed by the migratory birds' remarkable ability _____ they can fly thousands of miles without stopping to rest or search for food.

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Dr. Arin's research sparked considerable controversy _____ however, it laid the foundation for breakthroughs in modern genetics.

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The Nobel Prize–winning physicist Marie Curie _____ best known for her research on radioactivity _____ was the first woman to receive this prestigious award.

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Many plant species thrive in harsh climates _____ for example, cacti can store water in their stems to survive prolonged droughts.

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After analyzing data from the telescope, scientists identified three potentially habitable planets _____ Gliese 581g, Kepler-22b, and Proxima Centauri b.

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This year's scientific conference includes delegates from Berlin, Germany _____ Tokyo, Japan _____ and São Paulo, Brazil.

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During the expedition to the world's deepest cave, the rescue team found only one item left behind by the geologist _____ an old brass compass.

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Although vaccines brought hope for ending the pandemic _____ public health experts continued to warn that people should keep following basic preventive measures, such as wearing masks.

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By the end of the nineteenth century, inventors such as Thomas Edison and Nikola Tesla had made significant advances in electrical technology _____ this transformed modern society forever.

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The goal of the conservation project is not only to protect endangered species _____ but also to restore natural ecosystems that have been damaged by human activity.