Latest articles by Tim Wall
Shepherds Spread Grain Along Silk Road 5,000 Years Ago
Archeologists recently discovered domesticated crops from opposite sides of the continent mingled together in ancient herders campsites found in the rugged grasslands and mountains of central Asia.
Whales Moving Into Thawed Arctic Ocean
Whales are pushing into new territory as the far north warms quicker than the rest of the planet and sea ice retreats.
Tourists Chipping Away at Sea Shells
The tongue-twisting woman who sold seashells by the seashore may have damaged the coastal ecosystem.
Men, Beware of Killer Cold
From 1999 to 2011, men accounted for nearly 70 percent of hypothermia-related deaths in the United States.
1,900 Cyclones Whip the Arctic Every Year
Santa's reindeer must navigate through approximately 1,900 cyclones per year in the Arctic.
Kiwifruits' Freakish DNA History Exposed
Fuzzy, green-fleshed kiwifruit shares many genes with shiny, red tomatoes. Plus, the kiwifruit is a genetic freak with duplicated DNA.
War or Peace May Doom Korean DMZ Wildlife
The wilderness in the Demilitarized Zone (DMZ) between North and South Korea is home to wildlife that may not survive war or peace in the future.
Entire Maldives Nation Becoming Biosphere Reserve
The entire Maldives, a nation of low-lying islands, pledges to become a sustainable reserve.
Pirate Islands Turned to Treasure Islands for Fish
Only a scurvy pirate would dare fish the forbidden waters of the Tortugas Ecological Reserve.
Increase in Deadly Rains Linked to Climate Change
Recent extreme rains may have been intensified by the rising global average temperature.
In Photos: Animals That Get High
All levels of the animal kingdom from flies to top predators indulge in drugs and alcohol. Sometimes humans even push intoxicants on the creatures.
US Science Could Face Fiscal Cliff Doom
Some 31,000 scientists could lose their jobs if politicians fail to compromise before the fiscal cliff.
Where Does All That Food Come From?
Even after this year's widespread drought, one place without "made in China" labels is the grocery store.
Despite Hurricane, U.S. Still in Drought
Flooding from Hurricane Sandy has not relieved the drought in the Central and Southern U.S.
Bison Benefit from Prairie Buy Back
The American Prairie Reserve organization is trying to buy back the sea of grass, one ranch at a time.
How Low Can You Go, Mississippi?
Negative numbers mean the river is well below its average depth.
Obama and Romney Ignoring Climate Change
Despite an increase in Americans supporting the scientific conclusions behind climate change, the partisan issue will not likely play a major roll in the elections.
McDonald's Seeks Pampered Pigs
America's top fast food chain has demanded that farmers let their pigs out of gestation crates by 2022.
Wanna Learn Marine Biology? There's an App for That
The National Oceanic and Atmospheric Administration's Monterey Bay National Marine Sanctuary released the app, which features more than 1,300 images of animals.
Mexico Passes Climate Change Law
As a volcano there spews ash and greenhouse gases, the people pledge to reduce emissions.
