[zeroca]

Originally Posted by Fortean Einstein predicts that as an object gets closer to the speed of light its mass increases.

Does he? And do you strongly believe in it?

Hello Fortean!
Welcome to the forum.
I think as any object gets closer to the speed of light, its mass strives to zero, because it (object) turns into light, so no object can have the speed of light and have mass at the same time…
If you don’t mind, you can consult two my posts (#2 and #5, mainly the latter) of the thread “mass” and give your brief opinion about this matter again...

Thanks,
zeroca.