Daniel Lawler and Juliette Collen - What are attoseconds? Nobel-winning physics explained:

https://phys.org/news/2023-10-attoseconds-nobel-winning-physics.html

#Attosecond #Time #LASER #Electrons #NobelPrize #Physics

Keith Cooper - Time appeared to move 5 times more slowly in 1st billion years after Big Bang, quasar 'clocks' reveal:

https://www.space.com/quasar-clocks-universe-time-dilation

#TimeDilation #Timekeeping #Time #BlackHoles #QuasarClock #Clock #Quasars #Redshift #GeneralRelativity #Relativity #Astrophysics #Cosmology