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Shireen Gonzaga
Monarch butterfly on a milkweed flower. Image courtesy of Ryan Norris, University of Guelph.

What monarch butterflies prefer

Will our survival strategy for monarchs work? Initiatives emphasize milkweed plantings along roadsides. New research shows egg-laying monarchs much prefer off-road farmlands.

A depiction of the small rat-like mammals, that lived 145 million years ago, believed to be the earliest known ancestors of most modern mammals, including humans. Image courtesy of Dr Mark Witton, palaeo-artist, University of Portsmouth.

Scientists find teeth of early human ancestor

A remarkable find of fossil teeth from tiny, furry-tailed creatures – thought by scientists to be a human ancestor – dating back 145 million years.

A Carolina chickadee with a juicy caterpillar. Photo courtesy of Desiree Narango and Doug Tallamy.

Want birds in your yard? Plant native trees

A recently published study confirms that native trees are most effective in hosting caterpillars, an important food for birds.

A front view of Lucy, based on a reconstruction by paleoartist John Gurche. Image credit: Smithsonian Institution Human Origins Initiative. http://humanorigins.si.edu/australopithecus-afarensis-lucy-adult-female-reconstruction-base-al-288-1-artist-john-gurche-front

Human ancestor Lucy a tree climber

Lucy lived 3.18 million years ago in what’s now Ethiopia. An analysis of high-resolution CT scans of her fossilized skeleton shows she was equipped for climbing trees.

The general flow of global ocean circulation, with warm surface currents in red, and cold deep ocean currents in blue.Warm salty surface water from the Caribbean moves to the northern Atlantic Ocean, releasing heat to the atmosphere in those far nothern latitudes, then sinks to continue its journey as a cold south-moving current. Image via USGS.

Warm ocean currents are slowing down

Satellite data and ocean sensors show a definite slowdown since 2004 in ocean currents that warm eastern North America and western Europe.

Canela (left) and Blanquita (right) don’t need symbols to express their opinions. Image credit: Dominique Brand.

How to ask a horse what it wants

Do you want a blanket? Norwegian researchers recently described how they trained horses to use symbols to answer that question.

Great white shark and bluefin tuna, at Monterey Bay Aquarium. Courtesy of Niall Kennedy via Flickr.com

Shark and tuna convergent evolution

Lamnid sharks and tuna have similar physical traits that make them top ocean predators. But, a new study says, they took very different evolutionary paths.

European earthworm species Lumbricus terrestris. Image courtesy of Simone Cesarz.

Earthworm invaders alter northern forests

Native plant diversity in forests of northern North America is declining due to an invasion by earthworms introduced hundreds of years ago from Europe.

3.7-billion-year-old fossils show early life

Earth’s earliest lifeforms were single-celled microbes. The new fossil discovery places them on Earth even earlier than previously thought.

Goblin shark video, Greenland shark news

Japanese scientists utilize dramatic video to understand how goblin sharks feed. Danish scientists show that Greenland sharks can live to be nearly 400 years old!