Home Geography Page 95

Geography

megadrought risks

Global warming increases megadrought risks in the American Southwest

A megadrought is a prolonged drought lasting 20 years or longer. It can have very significant impacts on human. Historically, megadroughts have led to the...
Cretaceous syrinx fossil

Oldest known vocal organ of birds suggests dinosaurs may not sing

In a study newly published in Nature, researchers from The University of Texas at Austin found the oldest known vocal organ of a bird...
Shark fins

Shark fins, meat and cartilages contain toxins related to Alzheimer’s disease

Alzheimer's disease, also known as just Alzheimer's, is a chronic neurodegenerative disease that usually starts slowly and gets worse over time. It causes 60%-70%...
deep sea lanternshark

Glowing deep-water sharks’ DNA reveals distinct populations

An international collaboration, led by the University of Exeter and the University of Salford, has been investigating the population structure of the deep sea...
US national parks

US national parks have extremely early spring due to climate change

Many US national parks are already at the extreme warm end of their historical temperature distributions. Because of rapidly warming conditions, people need to enhance...
Golden Eagles

Wind turbines in California kill golden eagles from over 100 km away

Renewable energy production is expanding rapidly despite mostly unknown environmental effects on wildlife and habitats. In a recent study, scientists find that in California, wind...
global health burden in China and India

A third of global health burden related to mental illness is in China and...

China and India jointly account for 38% of the world population, and it is important to understand the burden attributed to mental illness within...
prehistoric shark

Scientists discover a new large prehistoric shark

In a recent study published in Historical Biology, researchers describe a new large prehistoric shark (Megalolamna paradoxodon gen. nov. et sp. nov.). The new species...
Diagram and photo of specimen

World’s earliest use of indigo blue was found in Peru 6000 years ago

Indigo blue is one of the most valued and widespread dyes in the world. The color is popular in both ancient times and the...
Great white sharks

Great white sharks and tuna share common genes to become fast swimmers and predators

White sharks and tuna seem to be two very different types of fish. White sharks, or mackerel sharks, are large, fast-swimming sharks found in oceans...