Both of them are highly and I mean highly corrupted by other heavily human factors.
Pride, Greed, Ignorance for instance, almost always coming back to the three poisons here, Gautama must have been on to something. J
When science is not obscured by pride and ignorance it is heavily tainted by greed and aggression, i.e. the best minds of the planet selling their souls to the devil aka so-called ministry of ‘defence’ more like the ministry of offence, lies, and bullshit.
Now on the word conscience, WITH knowledge, usually heavily slanted, twisted and repressive knowledge of a particular group much in love with their ethereal power made of thin air and different for each group too: A very muddy well at best.
Anyway we got about 1.5 billion years to wise up. Considering homo sapiens is relatively young that is quite a long time but by then we might have to move temporarily to Mars before the Sun collapses and that is if we survive the collision of the Milky Way with Andromeda and another billion things that could happen to us.
Or Brian Cox maybe right and No life form hangs around long enough to be consequential or to amount to anything really