If they can locate FRB beacons sitting at different cosmological distances, then according to Bing Zhang, an astrophysicist at the University of Nevada, Las Vegas, it should be possible to measure the amount of matter spread out in the vast emptiness of space between us and the sources of the flashes. (quantamagazine.org)
With an onboard version of the NICER telescope, a spacecraft could do the same thing with pulsars, which are relatively easy to spot in the vast emptiness of space: the new device would use three pulsars to calculate its position, then use a fourth to make sure it's correctly calibrated. (outerplaces.com)
And while it's true that brain science is still relatively nascent — we know more about the vast emptiness of space than our own brains — we are not in the dark. (mindbodygreen.com)