1) The speed of light is approximately 299,792,458 meters per second.

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

3) The Earth's core is hotter than the surface of the Sun.

4) The push for racial and social justice has led to discussions and actions to address systemic racism, promote inclusivity, and challenge inequalities in various areas, including education, criminal justice, and economic opportunities.