What do we call "a wave that can travel without a medium"?

What extraordinary role does learning think we can play in the universe?

Which entity owns most if the television stations, radio stations, and newspapers in the united states

You're doing research for a public essay on alternative medicine. which of the following sources has the most reliable information? a.a post on a social networking site about the undesired side-effects of different alternative medicinesb.a recent government report comparing the results of alternative and contemporary medicine for a specified diseasec.an anonymous article on a medical website that claims the success of alternative medicined.a 2003 study conducted by a medical research center about the effects of alternative medicine