As a developer, I need to understand the different versions of the TAUS EPIC API. Please identify and describe each available API version, including their intended use cases or target audiences, and specify if they are available in Sandbox and/or Production environments.
Navigate directly to `https://developer.taus.net/`. Identify the different API versions listed on the page. Note the purpose or target audience for each identified API version, along with their environment availability (Sandbox/Production).
Successfully navigate to `https://developer.taus.net/`. State that v1.0 is for existing integrations and is available in Sandbox and Production environments. State that v2.0 is for new QE subscribers and APE beta testers and is available in Sandbox and Production environments.