Quakes and blasts help scientists understand Earth's elusive inner core

About the size of Pluto, Earth’s inner core is made of solid iron and helps power the magnetic field that protects life from harmful space radiation. For more than a century, seismic waves have helped researchers identify and characterize the core’s properties. Science reporter Paul Voosen wrote about the most recent insights into the mysterious center of the planet.

[wmarclocher]

This is the kind of stuff that got me fascinated with science when I was a kid

[amirmoezz]

Loved it, please make a video about P and S waves.

[noenken]

0:17 And by roughly the size you mean half the size. xD

[derrickmcadoo]

Only fools say with confidence what is unknown. For example, the outer-most layer of Earth is considered, 'Land'. Water naturally rises and falls for expanses of 'Time'. That's why there are underwater 'roads'. Greece is a great example, as similar Greek stones, roads, and sculptures still exist underwater at varying depths right outside of existing cities.

[niiidar]

"As small as the planet Pluto" ? ?
Last I checked Pluto is still not a planet.

[whatsup]

What is the science behind female male attraction? Why some people love that one perticular person over other. Is there any explanation for that