Revelations from the US congress UFO hearing as pilot says government 'hiding crucial information'. 

Slack, the workplace messaging service, experienced an outage this morning, impacting millions.

The Met Office says last year’s heatwave could be considered a ‘cool’ year by the end of the century - largely due to climate change. 

Also in this episode:

• Scientists unravel mystery which could lead to future diamond finds
• Swan upping: Royal cygnet numbers drop by 40% in a year
• Twitter user gives up @X username to platform's official account

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