Perhaps it’s the biggest question science has left to answer, how did life begin? Now, molecular biologists in Cambridge university have discovered tiny molecules of RNA which they say might provide some clues. Science journalist and author Philip Ball explains what we know and whether we’ll ever find the origins of life on earth.
The UK government has been investing heavily in renewable energy in its bid to meet 95% of electricity demand with clean power by 2030.
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2026年2月23日14时45分，牛被众人抬上沟壑的一面山坡。南方周末记者郑丹摄