Well, not from CMB (because it's too weak) but from the energy delivered by hitting it, through pair creation.
Another weird thing are virtual particles that can popup without energy. They are similar to real energetic particles in a sense that they are manifestation of the same quantum field (for example charm quark field) but they are different from real particles because they don't carry energy and thus can't live long.
World is very weird. Math works though.
Proton is just a weird ball of bubbling energy that stays in one place because up quark and down quark quantum fields got "stuck" together there through complicated colored strong force. But there's so much energy there that wants to get free but can't that there are constantly things popping in and out of existence.
Another weird thing are virtual particles that can popup without energy. They are similar to real energetic particles in a sense that they are manifestation of the same quantum field (for example charm quark field) but they are different from real particles because they don't carry energy and thus can't live long.
World is very weird. Math works though.
Proton is just a weird ball of bubbling energy that stays in one place because up quark and down quark quantum fields got "stuck" together there through complicated colored strong force. But there's so much energy there that wants to get free but can't that there are constantly things popping in and out of existence.