@rappingwithmrjackson: Black Fact of the Week 🤳🏾📲👍🏾 Before FaceTime calls, WiFi calling, and texting 911… there was Dr. Marian Croak. A Black woman telecommunication engineer whose work helped change how the world communicates forever 🤯 Most people use her inventions every single day and don’t even know her name 📢 This is why I do these Black Facts every week 💯 Who’s a Black inventor/scientist more people should know about? 👇🏾 #mariancroak #facetime #virtuallearning #telecommunications #blackfacts #blackhistory365 #Science #middleschool #blackmaleeducator #teachersoftiktok #rappingwithmrjackson #fyp