Research Journey to the Center of the Earth

Researchers say they may be one step closer to solving the mystery at the core of Earth according to Science daily.

It has long been established that approximately 85 percent of Earth's core is made of iron, while nickel makes up an additional 10 percent. Details of the final 5 percent -- believed to be some amount of light elements -- has, until now, eluded scientists.

According to the research team, which includes Dr. Tatsuya Sakamaki and Prof. Eiji Ohtani, new experiments show that possible candidates for the light elements are hydrogen, silicon and sulfur?

Scientists find some thrive in acid seas

Researchers have found that ocean acidification may not be all bad news for one important sea-dwelling plant according to Science daily.

A team led by Dr Catherine Collier studied seagrass growing near underwater volcanic vents. Carbon dioxide from the vents increases the acidity of nearby water.

The researchers found that the more acidic the water was, the more the plant grew.

"The increased growth has nothing to do with the acidified water as such, but increased acidification means more carbon, which means the seagrass photosynthesises quicker," said Dr Collier.

How insects decide to grow up

Like humans, insects go through puberty. The process is known as metamorphosis. Examples include caterpillars turning into butterflies and maggots turning into flies according to Science daily.

But, it has been a long-standing mystery as to what internal mechanisms control how insects go through metamorphosis and why it is irreversible.

Now, a team of scientists, has solved the mystery. They also believe the findings, could be applied to mammals, including humans.

Seeds offer clue to domesticated plants' larger size

The seeds of domesticated plants could offer clues as to why cultivated crops are larger than their wild cousins, researchers have suggested according to BBC.

Increased size is common among domesticated plants but the reason for increased growth is little understood.

The increase in the biomass is of interest to plant breeders as it could affect productivity, such as reducing grain yields, they added.

A team of researchers investigated the traits that were responsible for the difference in size.

Comparing and contrasting various factors, such as biomass, leaf size and photosynthesis rates, the scientists were able to identify a number of characteristics that differed between domesticated plants and wild varieties.

They reported that domestication generally increased the above-ground biomass. The added that the domesticated specimens invested less in leaves and more in stems than their wild counterparts.

Ants use Sun and memories to navigate

Ants are even more impressive at navigating than we thought.

Scientists say they can follow a compass route, regardless of the direction in which they are facing according to BBC.

It is the equivalent of trying to find your way home while walking backwards or even spinning round and round.

Experiments suggest ants keep to the right path by plotting the Sun's position in the sky which they combine with visual information about their surroundings.