A collection of 1,000 prehistoric structures dubbed mustatils — the plural form of the Arabic term for rectangles — scattered across 124,274 miles (200,000 kilometers) in northwest Saudi Arabia may be the world's oldest monuments. A team of archeologists from the University of Western Australia (UWA) reached this conclusion after radiocarbon dating of charcoal found inside the courtyards indicated they were constructed in 5,000 BC — or about 2,000 years before the Egyptian pyramids or monuments like Stonehenge in southern England.
Since landing on Mars on February 18, 2021, NASA's Perseverance rover has achieved numerous "firsts," including beaming audio sounds from the Red Planet's surface. It also made history as the first spacecraft to record sounds from another spacecraft — the Ingenuity helicopter — on another planet.
Geologists have long maintained that our Earth comprises four layers — the crust, the mantle, the outer core, and, the deepest layer, the inner core. However, a team of scientists led by Jo Stephenson, a doctoral student in seismology at Australian National University in Canberra, now asserts that our planet may be harboring a mysterious, fifth layer — an "inner-inner" core as well.
Researchers worldwide are celebrating the discovery of the fossil of an adult oviraptorosaur brooding over a nest of eggs containing unhatched babies. The unprecedented discovery confirms scientists' suspicions that the two-legged bird-like dinosaurs were doting parents, which not only incubated their eggs, but also guarded them —at times putting their own lives at risk.
When Jennifer Johnson and her team embarked on their annual quest to survey the sturgeon population in the Detroit River in mid-April 2021, they had fully expected to find some super-sized specimens. However, the U.S. Fish and Wildlife Service biologists had never anticipated luring in the granddaddy of all sturgeons — a massive, 240-pound, 6-foot, 10-inch long fish that they estimate is at least a century old!
On April 22, 2021, for the second consecutive year, the US House of Representatives voted 216-208 to make Washington, DC, the nation's 51st state. Though the symbolically titled H.R. 51 bill is identical to the one passed on June 26, 2020, the legislation was never put to the vote in the then Republican-controlled Senate. However, this time around, the bill — which has the support of both President Joe Biden and Democratic Majority Leader Charles E. Schumer — will get a hearing in the upper house of Congress.
Every year, on the second Sunday of May, Americans show their appreciation for the real-life heroes in their lives — moms — with special treats and lavish gifts. This Mother's Day will be no exception. A National Retail Federation (NRF) survey of 7,818 people revealed that the approximately 83 percent of US adults who plan to celebrate the holiday on May 9, 2021, will each spend an average of $220.48. The total, an astounding $28.1 billion, is the highest amount in the survey's 18-year history and easily topples 2020's record spend of $26.7 billion.
The annual 3-to 4-millimeter rise in sea levels is expected to impact many coastal communities in the coming decades. However, few are as vulnerable as the Republic of the Maldives, a collection of more than a thousand picturesque islands in the Indian Ocean. NASA researchers believe that parts of what is "arguably the lowest-lying country in the world" will become uninhabitable by 2050, due to wave-driven flooding and limited freshwater. To combat the inevitable, the government recently unveiled plans for the world's first "true" floating island city.