1) The first commercially available digital camera, the Dycam Model 1, was introduced in 1990 and had a resolution of 376 x 240 pixels.

2) The Southern Ocean surrounds Antarctica and is the coldest and least-visited ocean.

3) Cyclones can cause widespread damage through high winds, heavy rainfall, and flooding. They can also generate tornadoes and trigger landslides.

4) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.