An aromatic answer is needed for this one...<hr><p style='color:grey; font-size:0.75em;'> Hosted on Acast. See <a style='color:grey;' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for more information.</p>

How do noise cancelling headphones work?

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.