spontaneous

Researcher Robert G. Endres of Imperial College London has created a new mathematical framework suggesting that the spontaneous appearance of life may have been far less likely than many scientists once believed.

"It's happening all over Dhaka," Kashem told AFP, saying videos of such spontaneous demonstrations appear constantly on social media.

We hear honking horns and spontaneous street music.

“It was so well-orchestrated that you just tricked yourself into believing that it was spontaneous.”

"There are no words to describe the feeling today. It's indescribable, like spontaneous joy, excitement, tears," said Rachel Peery, 49, an employee in the tech sector.