On March 23rd, the PhD student in the group 'Laser spectroscopy and Biophotonics' under the supervision of Prof. Martina Havenith-Newen (RUB) successfully defended her thesis with the title "THz spectroscopy of aqueous solutions: conditions beyond the ambient". Due to the special circumstances of the current time, the defence took place virtually in a video conference. We congratulate Serena on this success.