This column reviews the anatomy of the nasolacrimal duct system ... The puncta initially appears as a narrow slit, but with further eversion of the lower eyelid, it can be seen as wide opening.

In a nutshell Crowds naturally form organized lanes when most people walk in two main directions, but become chaotic when ...

How gravity causes a perfectly spherical ball to roll down an inclined plane is part of the elementary school physics canon.

The macromolecular organization of photosynthetic complexes within the thylakoids of higher plant chloroplasts has been a topic of significant debate. Using in situ cryo-electron tomography, this ...

Whether they’re opening for takeoff, spreading wide for a lazy soar or flapping to brake for landing, bird wings make flying ...

Then, during a commercial break, she will race up a narrow staircase to a 30-square ... she doesn’t see the potential from a business angle. Lately, she has been appearing more on The Outset ...

Jeremy Workman’s documentary looks back at a project that may sound like a joke but had serious underpinnings. By Alissa Wilkinson Jason Statham plays a construction worker who’s as deft at ...

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