Earth
- Oceans
Digging a trench to stop a tsunami
Boyd Kane built his own wave tank to study tsunamis and how he might change the seafloor to stop their advance.
- Climate
Arctic sends weird weather south
Arctic warming is affecting weather farther south, where most of the world lives. The impacts are especially worrisome for agriculture.
- Environment
‘Greener’ energy needed now, group warns
To avoid a looming environmental crisis brought on by global warming, people need to rely more on renewable energy sources. And fast. Without quick action, the world may face a harsh future, warns the latest report from the Intergovernmental Panel on Climate Change.
- Chemistry
Urine may make Mars travel possible
On Earth, urine is a waste. En route to Mars, it could be a precious renewable commodity: the source of drinking water and energy.
- Animals
When a species can’t stand the heat
When temperatures rise, New Zealand’s tuatara produce more males. With global warming, that could leave the ancient reptile species with too few females to avoid going extinct.
- Animals
Kangaroos have ‘green’ farts
The farts and belches of these animals contain less methane than do those from other big grass grazers. Microbes in their digestive tract appear to explain the ‘roos lower production of this greenhouse gas, a new study finds.
- Earth
The quake that shook up geology
North America’s biggest earthquake struck 50 years ago. Here’s what science has learned about Earth since the 1964 Great Alaskan Earthquake.
- Earth
Explainer: Telling a tsunami from a seiche
Waves that hit coastlines with ferocious power, tsunamis are one of the planet’s most devastating forces of nature. And seiches: They’re tsunamis little, but still potentially deadly, cousins.
- Environment
Burning to learn
Fires cause billions of dollars of destruction to homes and forests every year. But not all fires are bad, especially for forests. With a better understanding of fire, scientists can both help people prevent dangerous fires — and identify which ones it would be better to let burn.
- Environment
Explainer: How and why fires burn
A fire’s colorful flame results from a chemical reaction known as combustion.
- Tech
Branching out for safer water
Clean drinking water could be only a tree branch away, a new study finds.
- Earth
Earthquake-triggered lightning?
An experiment with beads offers support for the claim that a rare type of lightning may accompany some quakes.
