Impersonal Questions

How is it said that memories are formed in the brain?

Why was it decided to make English an international language?

When is it expected that humans will colonize Mars?

What is generally believed to be the most important invention of the 20th century?

How is it explained that some animals can predict natural disasters?

Why is it thought that climate change is the biggest challenge of our time?

Where is it suggested to find the best examples of Renaissance art?

When is it considered the best time to start learning a second language?

How is it determined which books become bestsellers?

Why is it recommended to drink eight glasses of water a day?