A cosmochemistry expert believes stardust found in meteors which are the oldest known matter on Earth could unlock the secret of how the Milky Way was formed when it merged with another galaxy.The space dust fragments were forged in the cooling furnace of dying stars that died billions of years ago, long before even our Sun was formed, and through painstaking analysis they are slowly giving up their secrets.Professor Philipp Heck spoke to Real Press in an exclusive interview about his research on how our galaxy, the Milky Way, merged with another galaxy before our Sun had even formed.(Real Press)