TLS Handshake: Client Hello’s for SSLv2.0 starting with hex 0x80. Why? [closed]

I am working on understanding the TLS Handshake process with Wireshark and an open-source TLS scanning tool.

I noticed that all SSLv2.0 Client Hello messages start with hex 0x80. Can anyone explain why that is? I noticed all the subsequent TLS versions (including SSLv3.0) start with 0x16 (Content-type == Client Hello).

Wireshark screen attached for reference.

wiresharkCapture