51动漫

Sound barrier

18 March 2015

Is sound sensitive to the composition of the atmosphere through which it propagates?

John O鈥橦ara, Mount Waverley, Victoria, Australia

This article appeared in print under the headline 鈥淪ound barrier鈥�

Topics: Last Word

More from 51动漫

Explore the latest news, articles and features

An image of a galaxy

Comment

The best new science-fiction novels of August 2026

Environment

How Europe can make its landscapes more fire-resilient

Health

Climate change may help eliminate malaria from West and Central Africa

Health

Could eating less protein slow ageing?

Popular articles

Trending 51动漫 articles

Thousands of people in China have had banned Alzheimer’s surgery

First-of-kind Guillain-Barr茅 drug switches off part of immune system

Where to watch the next total solar eclipse anywhere in the world

AI’s solution to 87-year-old riddle takes mathematicians by surprise

Could eating less protein slow ageing?

Chronic inflammation messes with your mind. Here’s how to calm it

Your body changes as you age and so should your diet 鈥� here鈥檚 how聽

Smallpox DNA in ancient Inca mummies shows virus came from Europe

How Europe can make its landscapes more fire-resilient

Game that reduces dementia risk may clear amyloid from men’s brains