Sip: on an Air Mail

Weekend reading:

• How to make an mRNA vaccine

• China’s new view of war

• Farewell to the father of flow: RIP, Mihály Csíkszentmihályi

• As Bitcoin hits new highs, is Tether its Achilles heel

Listen: Abba releases a new (old) song, Just A Notion

“Just a notion

That you’ll bе walking up to me

In a while and you’ll smile

And say hеllo and we’ll be dancing through the night

Knowing everything from thereon must be right.”