It is normal science. Tell me what part of the summary is that your L.I.Q brain is struggling with.
The atmosphere is the heat sink. It is the misused term of Heat trap. Are you thick?
In summary:
About 99% of the atmosphere(mainly N₂ and O₂) doesn't directly radiate energy to space but retains it in the form oftemperature, which is a result ofcollisions and kinetic energy.
The heat that’s retained by these gases can be transferred to other objects (like a thermometer) that then measure this temperature.
Radiation primarily occurs in the small fraction of the atmosphere containing gases like CO₂ and H₂O, but even then, the radiative effect is relatively small compared to collisional and convective processes.