European Researchers Create Acoustic Tractor Beam

A group of scientists from the United Kingdom and Spain have built the world’s first working acoustic tractor beam.

Holograms are 3D light-fields that can be projected from a 2D surface; Asier Marzo of the University of Bristol and the Public University of Navarre and his colleagues have created acoustic holograms with shapes such as tweezers, twisters and cages that exert forces on particles to levitate and manipulate them. Image credit: Asier Marzo / Bruce Drinkwater / Sriram Subramanian.
“It was an incredible experience the first time we saw the object held in place by the tractor beam. All my hard work has paid off, it’s brilliant,” said Asier Marzo of the University of Bristol and the Public University of Navarre, a team member and the first author of a paper in the journal Nature Communications .
The… Read more

Significant Link between Cancer and Height – Study

Cancer risk has been found to increase with height in both genders, says a large, long-term study from Sweden.

The large-scale study discovers link between cancer and height.
Scientists from the Karolinska Institutet and the University of Stockholm examined 5.5 million men and women in Sweden, born between 1938 and 1991 and with adult heights ranging between 3.3 feet and 7.4 feet (1 – 2.25 m).
They followed the group of individuals from 1958 (or from the age of 20) until the end of 2011, and found that for every 3.94 inches (10 cm) of height, the risk of developing cancer increased by 18 percent in women and 11 percent in men.
Additionally, taller women had a 20 percent greater risk of developing breast cancer, whilst the risk of developing melanoma increased by approximat… Read more