地球的重量在增加。根据科学家的计算，每年要有４万吨“宇宙灰尘”落在地球上。这些灰尘的大部分虽还可以返回宇宙空间，但仍有一部分留在地球表面，这样，就造成地球在不断地增加重量。地球的体积在膨胀。过去人们一直认为地球的体积是１１０００亿立方千米。科学家们最... The weight of the Earth is increasing. According to scientists’ calculations, 40,000 tons of “universe dust” will fall on the earth every year. Although most of these dust can still be returned to the space of the universe, part of it remains on the surface of the Earth. As a result, the Earth is constantly increasing its weight. Earth’s volume is expanding. In the past, people always thought that the volume of the Earth was 110 billion cubic kilometers. Scientists most...