"When looking for black holes, this is about as far back as you can practically go. We're really pushing the boundaries..."

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Link :
https://www.futurity.org/earliest-confirmed-black-hole-capers-lrd-z9-3289962/?utm_source=rss&utm_medium=rss&utm_campaign=earliest-confirmed-black-hole-capers-lrd-z9-3289962