Israel says three hostages are expected to be released on the first day of the ceasefire, with more small groups freed at regular intervals over the next six weeks.

As well as eventually paying back the value of the bond, governments pay interest at regular intervals so investors receive a stream of future payments.

By Saturday night it will be cloudier in the north and west, but there is a chance of some clearer intervals at times in the south and east.

Their strong magnetic fields can produce beams of radio waves that sweep across the sky like a lighthouse, resulting in metronomic radio pulses with intervals ranging from milliseconds to seconds.

At each site, scientists buried between 40 and 80 tea bags about 15 cm underground and collected these at various time intervals over three years, tagging their GPS location.