Walking through the mall, you just keep bumping into people.

It is true that, in practice, the exercise of this right is limited by the various constraints faced by women.

Race has always been a provocative subject when the needs of science and statistics intersect with politics.

Logistical obstacles prevent the Government from conducting investigations and prosecuting perpetrators throughout the country.

You may know that birds don't understand the concept of glass. They don't see it, so they fly into the windows and get killed.

With the support of the National Commission for the Development of Indigenous Peoples, legislation in Mexico has been amended to increase opportunities for action by an extensive network of community radio stations operating in indigenous areas, but these stations run up against the commercial interests of private broadcasters.

The president s domestic agenda is bold and revolutionary, but it clashes frontally with the most fundamental tenets of America s liberal and individualistic ethos.

We know that the investigations carried out by the International Criminal Court often run up against security problems on the ground.

This is a locust. There can be 80 million of them in a square kilometer, and yet they don't collide with one another.

The traditional value system of a State, which is predicated on welfare considerations for its citizens, is challenged by the profit orientation of the market system.

Instead, China should openly confront those neighbors with which it has disputed claims.

And the peace process will creep forward more process than peace until it encounters the next roadblock.

One answer would be because the kinetic energy of the water molecules is high and they bounce against things rapidly that's a kind of physical science argument.

But many of the BRICS, along with some other emerging economies, may hit a thick wall, with growth and financial markets taking a serious beating.

Indigenous peoples encounter various difficulties in effectively exercising their right to enjoy their own culture in community with other members of their group and maintaining the use of their languages.

You don't see luminescence until the submersible begins to move forward through the water, but as it does, animals bumping into the screen are stimulated to bioluminesce.

So, no surprise, the energy of Libyan youth ran head on into Qaddafi s inclination toward brutality and, more importantly, into his paid mercenaries.

Meanwhile, austerity fatigue in the eurozone periphery is increasingly clashing with bailout fatigue in the core.

WASHINGTON, DC Negotiations over Iran s nuclear program have again hit a wall, but the country s Supreme Leader, Ayatollah Ali Khamenei, appears unconcerned.

Why? Because as your attention shifts to your cell phone, you are actually losing the capacity to react swiftly to the car braking in front of you, and so you're much more likely to get engaged into a car accident.

Unaided human intuition schooled in Middle World finds it hard to believe Galileo when he tells us a heavy object and a light object, air friction aside, would hit the ground at the same instant.

The DPJ government will collide head on with the mandarins, partly because the party will find it hard to recruit sufficiently qualified policymakers.

Ozone in the Earth's stratosphere is created by ultraviolet light striking oxygen molecules containing two oxygen atoms (O2), splitting them into individual oxygen atoms (atomic oxygen).

This latter restriction excludes objects whose orbits may cross but which will never collide with each other due to orbital resonance, such as Jupiter and the Trojan asteroids, Earth and 3753 Cruithne, or Neptune and the plutinos.

After all, Syria is situated on a national, sectarian, regional, and geopolitical fault line, where the strategic interests of Russia, China, Iran, Iraq, and Lebanon confront those of NATO, Turkey, Saudi Arabia, Qatar, Kuwait, and Jordan.

National courts may consider the effects of European integration on their constitutional and democratic institutions, affirming or rejecting the integration that has already taken place, or setting limits to supranational arrangements that might further impinge on national sovereignty.

The United States has commenced its pivot to Asia, and its relations with China, in particular, seem constantly to be flirting with Thucydides s trap, the historical pattern that suggests that a rising power will inevitably collide with a reigning power.

Race has always been a provocative subject when the needs of science and statistics intersect with politics. Now that debate is once again heating up in France, as the planned introduction of ethnic statistics has caused a fierce dispute that touches the very heart of French republicanism.

Nate Silver has answers to controversial questions about race in politics Did Obama's race hurt his votes in some places? Stats and myths collide in this fascinating talk that ends with a remarkable insight on how town planning can promote tolerance.

The foreclosure relief plan is off to an even slower start, and is likely to run into numerous problems concerning how to rework delinquent mortgages without inducing a lot more delinquencies.

JERUSALEM As President Barack Obama s special Middle East envoy, former US Senator George Mitchell, learned during his visit to the region, America s efforts at Israeli Palestinian peace making are running up against three major obstacles.

If we'd evolved in a vacuum, we would expect them to hit the ground simultaneously. If we were bacteria, constantly buffeted by thermal movements of molecules, it would be different, but we Middle Worlders are too big to notice Brownian motion.

But emphasizing the reduction of social inequalities does not sit easily with America s profoundly individualistic ethos, and the attempt to Europeanize the nature of the social contract between the state and its citizens might yet crash against the constitutive principles of the American system.

The Enlightenment idea that our System II rationality can always point to an optimal choice about which every reasonable individual would agree clashes with the widely accepted modern idea that there is a plurality of reasonable choices.

For the Syrians, the major objective in concluding peace with Israel is rapprochement with the US, but they will balk at the Americans demand that they stop flirting with terrorism as a precondition for talks.

The story told by Israel's official propaganda machine clashes with the images of devastation in Gaza. On July 16 alone, four children were killed by Israeli warplanes as they played on the beach, and Gaza s Wafa hospital was shelled to pieces by Israeli tanks.

Now, the Moon has no atmosphere, so micrometeorites come in continuously, and the whole surface of the Moon is covered with powder now, because for four billion years it's been bombarded by micrometeorites, and when micrometeorites come in at about 20 to 60,000 miles an hour, they vaporize on contact.

What happens when the pull of a country s imperial history meets the constraints of its current international position? Will it try to weaken the constraints?