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The Countdown to Space Shuttle Endeavour’s Launch Now is Under Way.

The countdown to space shuttle Endeavour’s launch now is under way. The clocks started counting down on time at 7 a.m. EDT.

Launch teams are not working any issues that would delay liftoff on Monday, May 16 at 8:56 a.m.

Technicians at NASA Kennedy Space Center’s Launch Pad 39A are preparing to load the power reactant storage device (PRSD) and Endeavour’s external fuel tank with propellants.

A Countdown Status Briefing will be aired live at 10 a.m. on NASA Television and at

The STS-134 crew woke up at 1 a.m. to continue launch preparations. Commander Mark Kelly and Pilot Greg H. Johnson performed practice shuttle landings this morning in their Shuttle Training Aircraft. The crew will continue to review its Flight Data File and will review its ingress plan with the Vehicle Integration Test Team.
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The Physics of Superheroes

The Physics of Superheroes

Season 2, Episode 18

Image credit: Warner Bros. /

Superheroes in comic books and movies are so popular partly because we dream about what it would be like to have their wide range of amazing powers—super strength, the ability to fly, X-ray vision, the ability to stretch into fantastical shapes. Although they seem impossible, many superhero powers are based on real science. James Kakalios tells us about the physics principles of the caped crusaders, while Lee Silver points out that many animals have super-abilities that could potentially expand the limits of human biology. Eugene Mirman imagines what it would be like to leap tall buildings in a single bound—or at least be able to jump up to the second floor.


James Kakalios
Physics professor at the University of Minnesota, and author of the book “The Physics of Superheroes.”
Lee Silver
Molecular biologist, Princeton University


Eugene Mirman


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