1) The sitcom "Friends" is known for its iconic Central Perk coffee shop, where the main characters often gather.

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

3) The invention of the transistor by Bell Laboratories in 1947 revolutionized electronics and paved the way for the development of smaller, more efficient electronic devices.

4) Antarctica is the coldest, driest, and windiest continent on Earth. It is also the highest, with an average elevation of about 7,545 feet (2,300 meters).