It's a beautiful sound, but what does it do? &#10;&nbsp;<br /><hr><p style='color: grey; font - size: 0.75em; '>See <a style='color: grey; ' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for privacy and opt-out information.</p>

How do we know the Earth is not flat?

Have you ever wondered why stars twinkle? Or why the Earth is round rather than, say, square or triangular? Or even why we have earwax?Science Drops! answers these - and many other thorny science questions - in a fun-filled 90 seconds! Hosted on Acast. See acast.com/privacy for more information.