Purpose of double angle brackets on the bash command line?

Question

I'm trying to understand the following command:

user$ bash < <(curl -s https://something.com )

What do the < < do?

Answer 1

It's not < < but first < which means input redirection and then <( ... ) which means run the command inside the braces and make from that a file argument.

This looks to me quite equivalent as

curl -s https://something.com | bash