ScienceIQ.com

What is Volcanic Ash?

Small jagged pieces of rocks, minerals, and volcanic glass the size of sand and silt (less than 1/12 inch or 2 millimeters in diameter) erupted by a volcano are called volcanic ash. Very small ash particles can be less than 1/25,000th of an inch (0.001 millimeter) across. Though called 'ash,' volcanic ash is not the product of combustion, like the ...

Continue reading...

VolcanicAsh
Astronomy

Live Fast, Blow Hard, and Die Young

Massive stars lead short, yet spectacular lives. And, they usually do not go quietly, instead often blowing themselves apart in supernova explosions. Astronomers are curious about the details of the ... Continue reading

LiveFastBlowHardDieYoung
Biology

Hey Nose-Brain!

Sex, food, and smell are linked in our brain by ancient pathways governing appetite, odor detection, and hormones. In fact, another name for the brain's limbic system (a primitive ... Continue reading

NoseBrain
Biology

Eukaryotic Organisms

Eukaryotes include fungi, animals, and plants as well as some unicellular organisms. Eukaryotic cells are about 10 times the size of a prokaryote and can be as much as 1000 times greater in volume. ... Continue reading

EukaryoticOrganisms
Physics

Poincare's Chaos

Over two hundred years after Newton published his laws of planetary motion the King Oscar II of Sweden and Norway sponsored a most unusual competition that would discover a whole new science. ... Continue reading

PoincaresChaos

Lunar Explorations

LunarExplorationsEver since the beginning of intelligent life on Earth, the moon has been a focal point of human curiosity. Galileo’s discovery in 1610 that the moon had craters, valleys and mountains, instead of the smooth surface previously believed, only added to a burning desire to learn more.

So when exactly did our up-close-and-personal explorations begin? It was in 1959 that the Russians started sending their Luna probes to the moon. The first man-made object to land (actually, crash) on the moon was Luna-2. That same year Luna-3 sent the first images of the far side of the moon – the side hidden from the Earth for more than 4.5 billion years. The USA caught up with the Russians in 1969 when the first manned mission, Apollo 11, landed on July 20. 'That's one small step for man, one giant leap for mankind,' Neil Armstrong proclaimed as he stepped onto the lunar surface. (He was supposed to say 'one small step for a man,' but he misspoke under the pressure of that historical moment.) Since that day, five more manned Apollo missions have landed on the moon. The last one, Apollo 17, left the moon on December 14, 1972, and no humans have returned since. All together only ten humans, none of them women, have walked on the surface of the moon.