Bad Bios in simple words is a phenomenon where computers which are air gapped between each other can exchange data, take control over systems, etc. It was first noticed by Dragos Ruiu, but theoritically proven.
- http://www.infosecurity-magazine.com/view/35661/badbios-the-god-of-malware/
- https://plus.google.com/103470457057356043365/posts/9fyh5R9v2Ga
- http://www.infoworld.com/t/malware/badbios-next-gen-malware-or-digital-myth-230047
- http://www.infoworld.com/d/security/4-reasons-badbios-isnt-real-230636
And about scientific theory behind it: