1. The ‘Finnish Lapland‘ where the trees look like snow covered

The best places to see the northern lights are Alaska and northern Canada, Norway, Sweden, and Finland. During periods of particularly active solar flares, the lights can be seen in Scotland and northern England.

Winter is usually the best time to see the northern lights, due to lower leve...

While the traditional teaching system model involves lots of material to learn and to be tested afterward, times of crisis have recently proven that school can happen without all this.

Maybe the best example regarding how a school can work without testing and while giving more autonom...

PostgreSQL implements several types of indexes, such as btree, hash, gist, spgist. The default and most common type of index is btree. A btree (balanced tree) allows for easier and faster searching. This can be seen in the image above where we search for the key with the value of 53. 

Btree...