Astronomy

Astronomers Discover Decagonal Wave circling Saturn’s South Pole

These Hubble images show Saturn and the gas giant’s southern pole with its 10-sided atmospheric wave. Image credit: NASA / ESA / STScI / Agustin Sánchez-Lavega, UPV / Amy Simon, NASA’s Goddard Space Flight Center / Michael Wong, UC Berkeley / Alyssa Pagan.

For almost five decades, Saturn’s north pole has been famous for hosting a bizarre, six-sided jet stream known as the hexagon, a feature first spotted by NASA’s Voyager spacecraft in the 1980s and still churning today. Astronomers had long wondered whether the ringed planet’s southern hemisphere might hide a mirror-image structure. Now, it turns out the south pole has been quietly growing something...

Paleontology

Fossil of Giant Squid-Like Creature from Cretaceous Period Bears Marks of Deadly Attack

Reconstruction of a mosasaur and large fish preying on an injured Enchoteuthis, representing potential candidates for the bite marks on the octopod. Image credit: Kaitlin Lindblad.

Paleontologists studying a fossil unearthed in southern Manitoba, Canada, have identified what they believe are two bite marks on the internal skeleton of the ancient giant cephalopod Enchoteuthis, offering rare evidence of predator-prey interactions in the Cretaceous seas that once covered the middle of North America. Reconstruction of a mosasaur and large fish preying on an injured Enchoteuthis,...

Biology

Some of Smallest Bee Species See Best, New Study Finds

The blue-banded bee Amegilla murrayensis. Image credit: Callin Switzer.

Size, it turns out, is not everything when it comes to insect vision. According to a new paper published this week in the Proceedings of the National Academy of Sciences, some of the smallest bees studied have photoreceptors as sharp as those of much larger honeybee drones. The blue-banded bee Amegilla murrayensis. Image credit: Callin Switzer. “The honeybee (Apis mellifera) — only one of...

Medicine

Study: Night Owls Face Higher Mental Health Risks Tied to Work-Life Balance

Weekend recovery sleep doesn’t prevent weight gain or reduce insulin sensitivity. Image credit: Wok & Apix.

In a study of 2,266 workers in Finland, evening-type people, or night owls, were up to three times more likely to be treated for depression or anxiety than morning types, with poor work-life balance identified as a key contributing factor. Merikanto et al. showed that evening-types had more issues regarding work spillover to personal life and poor recovery from work and that these factors moderated...

Geology

Australia’s North Pole Dome Crater is Earth’s Oldest and Only Known Archean Impact Structure

The North Pole Dome crater: (A) simplified map of the East Pilbara Terrane (EPT, Western Australia), showing Paleoarchean granite domes (pink) and greenstone belts (greens and blues); the North Pole Dome (NPD) lies near the terrane center; (B) geological map of the NPD and the shatter-cone field (yellow star); (C) A quartz (Qtz)-carbonate vein cutting shatter-cone lineation. Image credit: Kirkland et al., doi: 10.1130/G54866.1.

Zircon crystals and impact-altered minerals show that a massive asteroid slammed into what is now the Pilbara region of Western Australia about 3 billion years ago. The North Pole Dome crater: (A) simplified map of the East Pilbara Terrane (EPT, Western Australia), showing Paleoarchean granite domes (pink) and greenstone belts (greens and blues); the North Pole Dome (NPD) lies near the terrane center;...