Have you ever doubted how the agricultural supply manages to feed the exponentially growing world population? One of the keys is to provide nitrogen, an essential nutrient for good yields, through the use of nitrogenous fertilizers. The question then becomes: Where does all that nitrogen come from?….
Discovered by the Zwicky Transient Facility in March 2022, this long period comet reached its closest position to
Earth on 1 February, and will only pay its next visit to Earth after another 50,000 years…
Since the first humans were born on Earth, we have been trying to learn about the Universe in which we inhibit. Thousands of years of observations and thinking have enabled us to develop a standard cosmological model capable of better describing the evolution of the Universe since the hot big bang. With technical progress and the development of precise measurement techniques, more results show that there is inconsistency between observation and theory, such as Hubble tension, which poses a pressing problem in modern cosmology…..
A common question we often encounter is: is mutation of virus truly predictable, and isn’t it random? Well, the short answer is, virus evolution is not equal to mutation. Mutations are random errors occur during the replication process of virus, and they do not have a preference on their destination. Yet virus evolution is a complex process shaped jointly by virus mutation, the host immune response, and the environment…..
自人类于地球诞生，我们一直尝试了解我们所在的宇宙。经过了数千载的观察和思考，我们已经发展了一套宇宙学标准模型，可让我们更好地描述宇宙热大爆炸以来的演化。然而，随著科技进步和精确测量技术的发展，更多结果显示观测和理论之间存在著矛盾，其中哈勃常数疑难，便是现代宇宙学中的一个迫在眉睫、亟待解决的问题…..
自人類於地球誕生，我們一直嘗試了解我們所在的宇宙。經過了數千載的觀察和思考，我們已經發展了一套宇宙學標準模型，可讓我們更好地描述宇宙熱大爆炸以來的演化。然而，隨著科技進步和精確測量技術的發展，更多結果顯示觀測和理論之間存在著矛盾，其中哈勃常數疑難，便是現代宇宙學中的一個迫在眉睫、亟待解決的問題…..
城市在各方面的重要性无容置疑。目前全球居住在城市的人口有 45 亿，超过全球总人口一半；城市占据全球超过三份之二的经济活动及生产，制造的温室气体排放量占全球温室气体排放量的四分之三。随著城市发展，城市的人口数目将会进一步增长，预计到2050年全球城市人口将多达70亿…..
It is undeniable that cities have far-reaching impacts on every aspect of life. Currently, half of the world’s population, around 4.5 billion people, living in cities around the world. Cities account for more than two-thirds of the world’s economic production and three-quarters of global greenhouse gas emissions. As cities grow, the population will increase further, with the global urban population expected to reach 7 billion by 2050…..