Five major outcomes from the latest UN climate summit

The latest UN climate summit, COP28, was always going to be controversial. It was held in a state whose economy is heavily dependent on oil and gas—the United Arab Emirates. The summit president, Sultan Al Jaber, remains ...

'Black widow' PSR J1544+4937 investigated in detail

Indian astronomers have performed long-term radio observations of a "black widow" millisecond pulsar known as PSR J1544+4937. Results of the observational campaign, published November 25 on the arXiv pre-print server, shed ...

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