Researchers uncover chemical origins of the Perseus cluster of galaxies
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Updates every hour. Last Updated: 22-Oct-2026 21:16 ET (23-Oct-2026 01:16 GMT/UTC)
Sunlight, or solar radiation, is a critical factor in determining local weather, crop productivity, and climate. Before current instruments were available to accurately and automatically determine solar radiation at a given location, daily weather diaries were kept in Japan by aristocrats and farmers alike. A research team leveraged a digitized daily weather diary to estimate the solar radiation in Tokyo between 1720 and 1912, and validated the data against estimation from observed sunshine duration since 1896. The analysis detected two periods of low sunlight that coincided with two famines in Tokyo’s history.
It’s impossible to talk about global economics without considering the existence of China. Since the 1990s, China has experienced rapid growth as the “workshop of the world,” now boasting the 2nd largest global economy. However, that growth has slowed, and the country now faces serious issues such as a bursting real estate bubble and a long-standing trade war with the United States. We spoke with Professor KAJITANI Kai, an expert in modern Chinese economics at the Graduate School of Economics and co-author of last year’s book entitled China Peaking Out, on the present and future of China’s economy.