The writer is a science commentator
The giveaway was not so much what was there — but what was missing. When astronomers looked closely at the cold molecular gas shrouding the supermassive black hole at the heart of our own galaxy, the Milky Way, they found a vast blank gap.
From the lip of the monstrous black hole, called Sagittarius A*, a large cone of nothingness funnelled outwards. This, researchers announced last week, is long-sought evidence of a hot breeze flowing outwards from the black hole and sweeping away the cold gas in its path, and one that has been blowing for around 20,000 years.
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