1) The global response to climate change includes the Paris Agreement, an international treaty aiming to limit global warming and strengthen countries' efforts to address climate change through mitigation and adaptation strategies.

2) Orchids are one of the largest families of flowering plants, with over 25,000 species.

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

4) The oldest known musical instrument is a flute made from a bird bone, estimated to be around 43,000 years old.