system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is antimatter and what is the significance of the recent discovery?
gpt
Antimatter is Matter with inverse charged sub atomic particles. So in normal matter, electrons are negatively charged and protons positively. In antimatter electrons are called positrons and are positively charged and Protons are Antiprotons and are negatively charged. Apart from that antimatter is behaving not so different from matter.

If you mix antimatter with matter things get a little more crazy. Matter and antimatter annihilate each other. In this process all their mass is turned to energy. If you would bring 1 g of antimatter hydrogen in contact with 1 g of hydrogen the resulting annihilation would set free 362 TJ energy or roughly 90 kT TNT.