Q&A: How a Little Exercise Brings Big Benefits
Healthland spoke with the author of The First 20 Minutes: Surprising Science Reveals How We Can ... So, are ab exercises like crunches and sit-ups actually bad for you? Crunches are okay if you do just a do modified crunch.
How Do You Levitate Things With Sound?
Here is my ... you could say that sound is a pressure wave where the region of pressure moves along at the speed of sound. There is a relationship between the intensity of sound in decibels and the magnitude of the pressure wave. You probably don’t ...
Incredible technology: How we explore the deep sea
For most of human history ... like WHOI's Nereus, that can function as either a remotely operated vehicle or autonomous underwater vehicle. Nereus' first mission was to explore the Challenger Deep, the deepest stretch of the Mariana Trench (a region ...
How to see quantum gravity in Big Bang traces
That would affect how electromagnetic radiation — including the cosmic microwave background (CMB) left behind by the Big Bang — travels through space ... really is quantized,” he says. The work does not convince Stephen Boughn, a theoretical ...
Incredible Technology: How to Explore the Deep Sea
The sub, carrying James Cameron, descended to the deepest part of the Mariana Trench, at a cavernous depth of 6.8 miles (10.9 km). From Herman Melville's "Moby Dick" to Jules Verne's "Twenty Thousand Leagues ... 3,200 feet (980 m) deep.