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The 52:52:52 project, launching on this site and on social media in 2025, will help you address 52 issues with 52 responses over 52 weeks.

This site addresses what's changing, at the personal, organisational and societal levels. You'll learn about key changes across more than 150 elements of life, from ageing and time, through nature and animals, to kindness and love...and much more besides, which will help you better prepare for related change in your own life.

Halcyon In Kaleidoscope features irregular and fragmentary writings - on ideas and values, places and people - which evolve over time into mini essais, paying humble homage to the peerless founder of the genre. The kaleidoscope is Halcyon's prime metaphor, viewing the world through ever-moving lenses.

A Mundane Comedy is Dom Kelleher's new book, which will be published in 2025. The introduction is available here and further extracts will appear on this site and on social media in the coming months.

Atmosphere

CO2 levels in the atmosphere Halcyon Impacts 24 April 2019

"The MLO" is the Mauna Loa Observatory in Hawaii, USA. This is the famous but remote station where scientists have been measuring CO2 in the air for the longest time. Data at Mauna Loa produced the iconic Keeling Curve. The pioneering work of Charles David Keeling provided key, new insights about how the earth system works.

Atmospheric CO2

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