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Yearly Archives: 2017
Observing the Birkeland currents
Plots of AMPERE magnetic perturbations and radial current density from the northern hemisphere for 24 February 2014 with start times from 1530 UT through...
‘Space tsunami’ causes the third Van Allen Belt
This is an illustration to explain the dynamics of the ultra-relativistic third Van Allen radiation belt, by Andy Kale.
Credit: Andy Kale
Earth's magnetosphere, the region...
Earth’s magnetosphere: Discovery of zebra stripes in space resolves a half-century mystery
The Earth's magnetosphere is home to the plasma waves being studied by Yuri Shprits and colleagues.
Credit: NASA
In the 1960s, NASA launched six satellites to...
Space sound waves around Earth: Electrons whistle while they work?
Space is not empty, nor is it silent. The region around Earth is filled with magnetic field lines and trapped energetic particles, zooming about...
How bats actually fly to find their prey
Bat flying at night. Night-time flights are more elaborate than daytime ones. Bats continuously rise and dip in curved flight trajectories, using large movements...
Sensory differences and the ‘evolutionary arms race’ between predators and prey
The mating songs of katydids, a greener, longer-legged cousin of crickets, have different acoustical characteristics that attract different species of bats.
Credit: Alex Lang
A new...
Bats use second sense to hunt prey in noisy environments
Bats (stock image).
Credit: © ArtThailand / Fotolia
Like many predators, the fringe-lipped bat primarily uses its hearing to find its prey, but with human-generated noise...
Evolution in species may reverse predator-prey population cycles
Male lion attack huge buffalo bull.
Credit: © Alta Oosthuizen / Fotolia
Populations of predators and their prey usually follow predictable cycles. When the number of...
Dingo poisoning should be stopped to protect native Australian mammals
This is a dingo in the Australian bush. A new study shows the poisoning of dingoes has a deleterious effect on small native mammals...
In the egg, American bullfrogs learn how to avoid becoming lunch
American bullfrog at the E.E. Wilson Wildlife Management Area in the Willamette Valley.
Credit: Photo by Lynn Ketchum, OSU
When exposed to potential predators as an...
New limits to functional portion of human genome reported
The functional portion of the human genome probably falls between 10 percent and 15 percent, with an upper limit of 25 percent, suggests new...
