Previous evidence of water on Mars now identified as grainflows

Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and dust move rather than liquid water, according to a new article.

These new findings indicate that present-day Mars may not have a significant volume of liquid water. The water-restricted conditions that exist on Mars would make it difficult for Earth-like life to exist near the surface of the planet according to Science daily .

Scientists analyzed narrow, down-slope trending surface features on Mars that are darker than their surroundings, called Recurring Slope Lineae, or RSL.

Secrets of succulents' water-wise ways revealed

Plant scientists have revealed new insights into the mechanisms that allow certain plants to conserve water and tolerate drought.

The research, could be used to help produce new crops that can thrive in previously inhospitable, hot and dry regions across the world according to Science daily.

Drought resistant plants, such as cacti, agaves and succulents, make use of an enhanced form of photosynthesis known as crassulacean acid metabolism, or CAM, to minimise water loss.

NASA Releases Historic 20-Year Earth Timelapse

NASA has released a glorious new 20-year time lapse video loop revealing the Earth as a living, ‘breathing’ entity, as cyclic meteorological events coupled with increasingly warm temperatures detail how our planet is rapidly evolving.

Detailing 20 years of constant satellite observation, the flora of the planet on land and at sea is clearly seen to cycle between cooler and warmer seasons, giving the rhythm of the video a breathing effect.

Pluto's hydrocarbon haze keeps dwarf planet colder than expected

The gas composition of a planet's atmosphere generally determines how much heat gets trapped in the atmosphere. For the dwarf planet Pluto, however, the predicted temperature based on the composition of its atmosphere was much higher than actual measurements taken by New Horizons spacecraft in 2015.

A new study proposes a novel cooling mechanism controlled by haze particles to account for Pluto's frigid atmosphere, according to Science Daily.

"It's been a mystery since we first got the temperature data from New Horizons," said first author Xi Zhang, assistant professor. "Pluto is the first planetary body we know of where the atmospheric energy budget is dominated by solid-phase haze particles instead of by gases."

Crested pigeons use feathers to sound the alarm

Many animals will sound an alarm to alert other members of their group of impending danger. Now, researchers reporting have shown that crested pigeons do this in a surprisingly non-vocal way. One of their main flight feathers produces a critical high-pitched sound as the birds fly away. As they flap faster to escape a predator, that alarm signal automatically increases in tempo, according to Science Daily.

Importantly, the researchers also show that other crested pigeons flee when they hear that sound. The findings confirm that the sound is a bona fide signal, not just a side effect of flight.