1) The Earth's core is primarily composed of iron and nickel and is as hot as the surface of the sun.

2) The world's longest traffic jam occurred in China in 2010 and lasted for 12 days, stretching over 60 miles (97 km).

3) As of 2023, the COVID-19 pandemic continues to impact countries worldwide, with efforts focused on vaccination campaigns, public health measures, and economic recovery.

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