The heart, in contrast, is a universal symbol that resonates across languages, cultures, and time zones. The heart is more expressive, enabling you to convey a range of emotions and easily connect with people. And in our tests, we found that people loved it. Akarshan Kumar, on #TwitterHeart Here’s the thing. There is no single Twitter experience, no coherent “you” that can be better enabled by corporate tinkering within its miniaturist frame, because Twitter is just people. Millions of us use…