Shadab Alam

A river drawn on a map is always a single line. But stand on the bank, and you will see that within the channel there are faster currents, eddies, and branches that merge and split. The cosmic web is like that river, but made of dark matter, and until recently astronomers drew it as a single line.

The churning cauldron of turbulence burns energy in two distinct ways. Vortices, like whirlpools in a maelstrom, twist the fluid and rub layers against each other. Shock waves, like a sudden clap, abruptly compress the gas and turn motion into heat.