Neil deGrasse Tyson hosts another 'Things You Thought You Knew' episode of StarTalk, exploring the physics behind sonic booms, daily temperature patterns, and wind formation. Chuck Nice joins as co-host, providing comedic commentary and asking clarifying questions throughout the scientific explanations.

The discussion covers three main topics: the mechanics of sonic booms and sound barriers, the surprising timing of daily temperature peaks and the role of infrared radiation, and the fundamental causes of wind patterns from local breezes to massive hurricane systems. Tyson also addresses scientific inaccuracies in The Martian regarding Martian windstorms, explaining why Mars' thin atmosphere cannot generate the dangerous winds depicted in the story.

Breaking the Sound Barrier: How Sonic Booms Actually Work

When aircraft fly at subsonic speeds (under 700 mph), sound waves travel ahead of the plane at 200 mph relative to the aircraft, allowing observers to hear it approaching.

At Mach 1 (700 mph), the aircraft matches the speed of sound, creating a situation where 'you don't even know it's there until it is directly overhead' - Neil

Beyond Mach 1, aircraft leave sound behind in a compressed 'wall of sound' that creates the sonic boom when it passes over observers.

The crack of a whip demonstrates the same principle on a smaller scale - the tip moves faster than sound speed, creating a 'mini sonic boom' or 'sonic crack'.

Particles moving faster than light speed through transparent materials create 'light booms' - electromagnetic equivalents of sonic booms.

Why 3 PM Is Hotter Than High Noon

The sun peaks in yellow-green light that passes through the atmosphere without being absorbed, hitting Earth's surface directly.

Ground surfaces absorb visible sunlight and re-radiate it as infrared, which gets trapped by atmospheric water vapor, creating a 2-3 hour delay in peak heating.

Desert regions experience 40+ degree temperature swings because low humidity allows infrared heat to escape rapidly after sunset.

Island nations like Hawaii maintain narrow temperature ranges (76°F day, 68°F night) due to ocean humidity stabilizing heat flow.

The coldest time of day occurs just before sunrise, after maximum heat loss through the night, while August remains the hottest month despite June having the longest days.

At -40 degrees, Fahrenheit and Celsius scales converge: 'it doesn't matter' which scale you use because both read identically - Neil

Wind Patterns: From Gentle Breezes to Hurricane Eyes

Wind results from 'unequal heating of Earth's surface' creating pressure differences that air moves to equalize - Neil

Rising heated air creates partial vacuums that get 'filled from the sides,' generating horizontal wind movement across the surface.

Hurricanes form when warm, unstable air creates very low pressure centers that draw in surrounding clouds, with Earth's rotation veering them rightward into spiral patterns.

The doldrums are ocean regions where large areas of descending air create windless zones that historically trapped sailing ships without propulsion.

Mars dust storms appear dramatic but cannot topple spacecraft because the Martian atmosphere is '1/100th the thickness of Earth's atmosphere' - Neil

Regarding The Martian, Tyson gave author Andy Weir 'poetic license' for the scientifically inaccurate windstorm scenario because 'so much else in that novel was so well calculated and thought through.'