20 Things You Didn't Know About: Inner Earth...
includes
one tidbit #7 - Earth's solid and liquid cores together generate the
magnetic field that keeps the solar wind from stripping away our
atmosphere. [Mars has no substantial atmosphere because it's been long
ago striped away by the solar wind because its inner core now lacks the
degree of radioactive heat generation to generate a magnetic field like
Earth does.]
Now read the other 19 tidbits at:
http://discovermagazine.com/2013/jan-feb/20-things-you-didnt-know-about-inner-earth
Note:
The Discover magazine's last page is always "20 Things You Didn't Know
About" on different topics. Factoids, nuggets, and tidbits on the topics
you always wondered about (click on general topic OR click on specific
titles or author, etcetera) from online Discover magazine:
http://discovermagazine.com/departments/20-things-you-didnt-know
MIND
& BRAIN 20 Things You Didn't Know About... the Human Voice July 23,
2015 — By Jim Sullivan Think "anemone" and "Worcestershire" are
mouthfuls to say? Try your tongue at speaking !Xóõ. MORE ABOUT: LANGUAGE
HEALTH & MEDICINE 20 Things You Didn't Know About... Sweat May 28,
2015 — By Jessica Festa Your health, feelings and diet can change your
sweat composition — but your unique sweat fingerprint is distinctly
yours. MORE ABOUT: PERSONAL HEALTH HEALTH & MEDICINE 20 Things You
Didn't Know About... Testosterone April 30, 2015 — By Leah Shaffer The
manly hormone evolved 500 million years ago — from estrogen. MORE ABOUT:
PERSONAL HEALTH HEALTH & MEDICINE 20 Things You Didn't Know
About... Immortality April 2, 2015 — By Grace Halden Humans continue to
seek after it, but other life forms have already achieved it. MORE
ABOUT: AGING ENVIRONMENT 20 Things You Didn't Know About... Dust
February 26, 2015 — By Elizabeth Preston Dust is so much more than a
mess to clean up before the in-laws arrive. MORE ABOUT: EARTH SCIENCE
TECHNOLOGY 20 Things You Didn't Know About... Nuclear Accidents January
22, 2015 — By Kristen Pope Nuclear meltdowns have both harmed and
benefited wildlife in contamination zones. MORE ABOUT: ENERGY, POLLUTION
ENVIRONMENT 20 Things You Didn't Know About... the North Pole October
30, 2014 — By Gemma Tarlach For starters, which one? There are four
North Poles. MORE ABOUT: ARCTIC & ANTARCTIC SPACE & PHYSICS 20
Things You Didn't Know About... Galaxies October 2, 2014 — By Katherine
Kornei The Milky Way rotates at 560,000 miles per hour, and makes a full
revolution every 200 million years. MORE ABOUT: THE UNIVERSE HEALTH
& MEDICINE 20 Things You Didn't Know About... Blood August 28, 2014 —
By Veronique Greenwood Blood types aren't unique to humans: Dogs have
more than a dozen. MORE ABOUT: PERSONAL HEALTH LIVING WORLD 20 Things
You Didnt Know About... Cats August 1, 2014 — By Gemma Tarlach Where to
begin? Our relationship with our feline friends goes back some 9,500
years! MORE ABOUT: PETS, ANIMALS SPACE & PHYSICS 20 Things You
Didn't Know About... Noise May 23, 2014 — By Jonathon Keats Did you know
the Big Bang was noiseless? MORE ABOUT: SENSES LIVING WORLD 20 Things
You Didn't Know About... Animal Senses April 30, 2014 — By Molly Loomis
From super-sniffers to electricity detectors, animals have an array of
impressive sensory capabilities. MORE ABOUT: UNUSUAL ORGANISMS, ANIMALS
LIVING WORLD 20 Things You Didn't Know About... Hoaxes March 28, 2014 —
By Jonathon Keats April Fools' Day started with Julius Caesar, and 19
other things you didn't know about hoaxes. But be careful: don't believe
everything you read... MORE ABOUT: ANIMALS, ARCHAEOLOGY, DINOSAURS
TECHNOLOGY 20 Things You Didn't Know About... 3-D Printing February 26,
2014 — By Christian Millman 3-D printing is all the hype these days, but
there's a lot about the technology that you don't know. MORE ABOUT:
MATERIALS SCIENCE, GADGETS LIVING WORLD 20 Things You Didn't Know
About... Neanderthals November 21, 2013 — By Jonathon Keats The hominids
are depicted as degenerate and slouching because the first Neanderthal
skeleton found happened to be arthritic. MORE ABOUT: NEANDERTHALS, HUMAN
ORIGINS HEALTH & MEDICINE 20 Things You Didn't Know About... Hunger
October 16, 2013 — By Tasha Eichenseher Get the skinny on why tummies
rumble and how we might feed the world. MORE ABOUT: NUTRITION MIND &
BRAIN 20 Things You Didn't Know About... Superstition September 19,
2013 — By Rebecca Coffey Knock on wood or not, superstition appears to
have played a positive role in evolution and it continues to affect
human behavior. Lucky us. MORE ABOUT: PSYCHOLOGY MIND & BRAIN 20
Things You Didn't Know About... Failure August 16, 2013 — By Jonathon
Keats Next time you see the F-word, remember you're in good company.
MORE ABOUT: PSYCHOLOGY SPACE & PHYSICS 20 Things You Didn't Know
About... Gravity July 19, 2013 — By Bill Andrews The apple of Newton's
eye and the focus of Einstein's work, gravity is weaker than you
probably think and weirder than you probably imagined. MORE ABOUT:
GRAVITY, GRAVITATIONAL WAVES HEALTH & MEDICINE 20 Things You Didn't
Know About... Beer May 29, 2013 — By Christian Millman Sate your thirst
for knowledge with these facts about beer's ancient origins, health
benefits and surprising chemistry. MORE ABOUT: NUTRITION, FOOD SCIENCE