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Tributes pour in from across the political and intellectual spectrum as colleagues, friends and admirers remember the nuclear scientist, science communicator and public intellectual.
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About 60 per cent of Ghana’s water bodies are polluted, a senior scientist at the CSIR-Water Research Institute (CSIR-WRI), Dr Franco Enobrenaco, has warned.
The firm says it has invested in the chalk stream and water quality is "influenced by a range of factors".
Researchers have studied a mysterious rhythmic clanging noise produced by male sperm whales.
Like a collage made of layered sheets of colored cellophane, a vibrant new image layers observations of a famous star-forming nebula from NASA space telescopes.
From spears and the invention of the wheel to smartphones and robots, human societies have been building and using tools from the beginning.