body
What cannabis does to your body and brain
Despite humans having used cannabis for thousands of years, it is only recently that we have started to work out why it affects us the way that it does. Chemicals in cannabis called cannabinoids activate receptors throughout our bodies that form the endocannabinoid system. This system is involved in regulating everything from mood to memory,…
Ultrasound can push vaccines into the body without needles
Ultrasound can be used to send vaccine molecules through the skin Andrey Zhernovoy/Shutterstock Vaccines can be delivered through the skin using ultrasound. This method doesn’t damage the skin and eliminates the need for painful needles. To create a needle-free vaccine, Darcy Dunn-Lawless at the University of Oxford and his colleagues mixed vaccine molecules with tiny,…