On: A new experiment casts doubt on the leading theory...

[denton-scratch]

> neither of which matter at planetary scales like here on earth

...except, isn't it true that the galaxy that contains the earth wouldn't exist were it not for dark matter?

[6nf → denton-scratch]

There's nothing preventing the formation of galaxies, stars and planets if you take away dark energy. Dark matter is not as clear cut but it's still likely to be unimportant.