What is the lightest thing on earth ?

Good point. I was looking for things at room temperature that weren’t “blown up” with air*. but ice is close enough to room temperature for most people’s purposes.

*like pumice and aerogels

My wallet.

There are some who feel that certain opinions have great substance. (Generally, they mean their own opinions, or at least those opinions with which they agree.) Casual conversation is, at times referred to as light discourse, so it would be lighter than other, more weighty matters.

I know that often even things left unsaid can weigh heavily upon one. Not to mention heavy emotional burdens, and even the opposite case of uplifting news.

Tris

Do we even know for sure if gravitons exist?

And it’s strong enough to not just collapse under the air pressure? That’s awesome.

They almost certainly exist, and we know a few of their properties, but we never have and probably never will observe individual gravitons, and we know very little about how they interact with other particles.

Heidi Klum

Reported.

Ew. Zombie spam.