Trees can tell if deer are trying
to eat them. Due to their ability
to detect deer saliva, trees defend
themselves by producing excess
acids that cause their buds to taste
bitter so that the deer will lose
interest and leave them alone. Source
Kepler-186f is the first Earth-sized planet ever found that also orbits in its star’s habitable zone. Although its size and orbit are known, its mass and composition are not - however, existing models suggest that it could have a rocky terrain and an atmosphere, making it potentially the most Earth-like planet discovered so far.
film of a tornado emerging from the wall cloud of a supercell in south dakota. a supercell is a severe thunderstorm with a deep rotating updraft. most tornados are associated with supercell thunderstorms, the largest, most severe class of single cell thunderstorms.
a tornado is created when the cooler downdraft of rear midlevel winds combine with the updraft of warm, moist and horizontally spinning surface level winds, which condense into a funnel as they’re drawn upward into what is called the mesocyclone. (video)
How does an aircraft fly?
Think of it like this, due to the design of the wing, larger number of
air molecules are hitting the bottom portion of the aircraft than the
As a result, a upward force acts on the wing, hence the wing lifts!
This works fine till we get to the wing tips.
the wingtip, the air from a higher pressure wants to move to the region
of lower pressure. And as a result, this forms vortices ( fancy name
for the swirling motion of air ) known as Wingtip Vortex. ( because its
formed in the wing tips!!! )
And it is due to the ramification of this, that we obtain those gorgeous smoke angels. Pretty cool huh ?
Seven explorers are about to embark upon an 80-day simulated mission to Mars.
On Saturday (Sept. 24), the crewmembers of the Mars 80 mission — who hail from France, Japan, Russia, Australia, India and Canada — will begin work at the Mars Desert Research Station (MDRS), a facility in the Utah desert run by the nonprofit Mars Society.
The team will conduct a campaign of geology, microbiology and paleontology research in the area, operating under many of the same pressures and constraints that real-life Mars pioneers would face. Crewmembers will also test out spacesuit technologies and other gear that could help humanity get a foothold on the Red Planet, Mars Society representatives said.