science

How did you not see that joke comet?

One of the world's great radio telescopes isn't hearing voices – for the first time another giant dish has picked up one of the mysterious "fast radio bursts" (FRBs) that have been puzzling astronomers at the Parkes Radio Telescope. The find confirms these bursts indeed come from outer space, but beyond that their source is still wide open.

Last year the astronomers reported four bursts picked up by the celebrated Australian telescope. As each FRB lasted around a millisecond there was no time to have other telescopes check the same location, and the fact that no other telescope had picked up anything similar raised the possibility that something local was interfering with the Parkes telescope.

Now, however The Astrophysical Journal reports that the 305m Arecibo Telescope has picked up a similar burst while searching for pulsars. The burst occurred in 2012, but not noticed at the time. "FRB 121102's brightness, duration, and the inferred event rate are all consistent with the properties of the previously detected Parkes bursts," the authors report.

Rabe formed in an instant when a large rock slammed into the surface of Mars long ago. It may have started as a normal, if large, impact crater, but things change. The cause of the flat floor isn't well known, but likely due to volcanic deposits filling it, plus material blown in over time.

Actually, that last bit is very important. Mars has an atmosphere, though a thin one, pushing down with less than 1% of the pressure on the surface as Earth's air does here. But it's enough.

MSU scientists have made a number of improvements on the fish, including the ability to glide long distances, which is the most important change to date. The fish now has the ability to glide through the water practically indefinitely, using little to no energy, while gathering valuable data that can aid in the cleaning of our lakes and rivers.