Question of the Week
Does one or two steps at a time require more energy, and which is better for a work-out?
How did birds survive the dinosaur mass extinction?
Could a jaunt to Jupiter be the physics-version of anti-wrinkle cream?
Find out how you can unlearn something that you have already learned!
If we slice the earth in half and leave the inner and outer core intact, like cutting the avocado, what would it look...