From large social media sensations to deep-sea slugs in the Midnight Zone, Earth is home to many exciting animals waiting for their close-up. Here are 11 of the most thrilling animal stories covered by Popular Science this year.
First photo of a newborn great white shark
A wildlife filmmaker and biology doctoral student captured what may be the first photograph of a newborn great white shark. Filmmaker Carlos Gauna and University of California, Riverside biology doctoral student Phillip Sternes were searching for sharks near Santa Barbara on California’s central coast. Most great whites have gray tops with white bellies, but Gauna’s drone camera revealed a roughly 5-foot-long shark pup with more white on its body than usual. Upon zooming in on the photos, they noticed a layer of white skin that appeared to be shedding as the shark swam. The team believes they witnessed a newborn great white shedding its embryonic sac.
The images and discoveries are detailed in a study published in the journal Environmental Biology of Fishes in January.
Tardigrades: Built darn tough
Tardigrades had an eventful year. These microscopic creatures, also known as “water bears,” can survive extreme temperatures, lack of water, lack of oxygen, and radiation in various habitats.
In January, it was discovered that tardigrades possess a molecular sensor that detects inhospitable elements in their environment, prompting them to go dormant or resume normal activities. These findings were outlined in the journal PLOS ONE.
In April, scientists uncovered new insights into their extraordinary resilience. A unique mechanism in their DNA works overtime to repair DNA damaged by radiation. When exposed to radiation, tardigrade cells activate hundreds of genes to produce proteins that repair DNA, leading to levels of DNA repair described by study co-author and biologist Courtney Clark-Hachtel as “ridiculous.”
The year of the cicada
While 2024 was the Year of the Dragon in the Chinese zodiac, it was the year of the cicada in certain parts of the United States. Trillions of loud, red-eyed periodical cicadas emerged from underground in a rare double emergence event. These cicadas resurface every 13 or 17 years and can produce noise equivalent to a jet engine.
During the “Cicadapocalypse,” Brood XIII and Brood XIX cicadas emerged simultaneously from April to July. Brood XIII, a 17-year group, spans parts of Indiana, Wisconsin, Iowa, and northern Illinois. Brood XIX, a 13-year group, primarily resides in Arkansas, Missouri, Tennessee, Alabama, Georgia, North Carolina, South Carolina, and southern Illinois.
Parts of Illinois became the epicenter of the Cicadapocalypse, with a four-year-old discovering a rare “one-in-a-million” blue-eyed cicada.
“I would compare the periodic cicadas to natural phenomena like April’s total solar eclipse,” said Penn State University entomologist Michael Skvarla to Popular Science.
[Related: Anglerfish are so much more than just their dangly bioluminescent lures.]