Twitter announced its new way of showing conversation to make it easier to follow exchanges. The new user interface has the first tweet of the conversation on top with a blue line between tweets that indicate that the connection between them.
You can view up to three tweets on the home timeline and just choose to expand the thread if you want to read the entire conversation. Conversations can also be emailed for non-Twitter users’ benefit via Twitter.com. Individual tweets can be shared through email with the iPhone and Android apps.