Videos

While bioluminescence — the ability to glow in the dark — is a fairly common occurrence in fish and squid that live in the ocean's darkest depths, its presence in sharks is not as well-documented or understood. Now, the discovery of the largest-known luminous vertebrate — the six-foot-long kitefin shark — and two other glowing shark species has enabled researchers to gain valuable insights into the luminescent abilities of the deep-sea creatures....

Easter, which will be observed on April 4, 2021, is the oldest and most important Christian festival. Many adults commemorate the holiday, which celebrates the resurrection of Jesus Christ on the third day after his Crucifixion, with prayers and fasting for 40 days before the event. For children in the US, Easter is largely about fun activities like seeking out candy-filled eggs, meeting the Easter bunny, and participating in spring parades. However, not everyone celebrates this all-important holiday with these traditions....

The deadly winter storm, which swept across 22 states — from Texas to Maine — the week of February 14, 2021, delivered large amounts of snow and ice, and established numerous low-temperature records. While over 140 million Americans were impacted, Texas was particularly hard hit. The Arctic chill caused about 60 percent of the state's energy sources to go offline and water pipes to freeze and burst, leaving millions without electricity and water....

Located in California's Sierra Nevada mountains, Yosemite National Park is famous for its giant, ancient sequoia trees and impressive rock formations, like El Capitan and Half Dome. However, from mid-to-late February each year, the pristine preserve's main attraction is Horsetail Fall — a temporary waterfall that flows over the eastern edge of El Capitan every winter. During the brief two-week-period, the 1,500-foot-tall waterfall frequently transforms into a spectacular natural Firefall....