And the last time it happened was in the 17th Century, when the Thames River froze. Scientists call this the „Maunder Minimum“.

Physicist Dan Lubin at the university and his team studied the past event and concluded that were are in for a worse case. The Sun is expected to get much dimmer than last time and, in scientific terms, it is a „grand minimum“ — a time period in the 11-year solar cycle when the solar activities are at the lowest point.