Male or female? Scientist challenges evidence of sex differences among dinosaurs

A paleontologist is countering decades of studies that assert that some dinosaurs can be identified as male or female based on the shapes and sizes of their bones. According to Science daily.

Dr. Jordan Mallon, a dinosaur specialist at the museum, argues instead that the fossil evidence for these distinctions is inconclusive and, as a result, it might be time to "rewrite the textbooks." His report, on the biological principle of sexual dimorphism, where males and females of a species can be distinguished based on physical characteristics other than sexual organs.

Fledgling stars try to prevent their neighbors from birthing planets

Newly formed stars are surrounded by a disc of dense gas and dust. This is called the protoplanetary disc, as material sticks together within it to form planets. According to Science daily.

Stars of different shapes and sizes are all born in huge star-forming regions. Scientists know that when a protoplanetary disc around a relatively small star is very close to a massive star, the larger star can evaporate parts of the protoplanetary disc.

However, it was thought this was only the case where very large stars shone on the protoplanetary disc. Now, researchers have discovered that a protoplanetary disc shone on by only a relatively weak star is also losing material. The protoplanetary disc studied, called IM Lup, belongs to a star similar to our Sun.

Comet 67P full of surprises: Growing fractures, collapsing cliffs and rolling boulders

Images indicate the surface of comet 67P/Churyumov-Gerasimenko was a very active place during its most recent trip through the solar system, says a new study.

The images show the comet's surface is full of growing fractures, collapsing cliffs and massive rolling boulders. Moving material buried some features on the comet's surface and exhumed others.

"As comets approach the sun, they go into overdrive and exhibit spectacular changes on their surface," said Ramy El-Maarry, study leader. which gave us the chance to look at a comet in ultra-high resolution for more than two years."

Oldest croc eggs discovered in dinosaur nest

The oldest crocodilian eggs known to science have been discovered in the cliffs of western Portugal .According to BBC.

They are so well preserved that they give an insight into the "mother croc" that laid them 152 million years ago.

The prehistoric crocodile ancestor would have spanned two metres, based on the size of the larger eggs, say palaeontologists.

Crocodilians arose some 200 million years ago, when they prowled the land with early dinosaurs.

Today, they are found throughout the world and are successful predators.

The moon is on a collision course with EARTH

The moon is currently spinning away from Earth at a rate of around 3.8 centimetres a year.

But experts believe that in the future this could change, and the two bodies could one day be on a collision course.

If the moon and Earth collide, the energy released in the merging would melt the Earth into a magma ocean.

Thankfully, the catastrophic event is not forecast to occur for some 65 billion years.

The prediction comes from Dr Jason Barnes, a planetary scientist.

Dr Barnes said: 'The final end-state of tidal evolution in the Earth-moon system will indeed be the inspiral of the moon and its subsequent collision and accretion onto Earth.'

Subcategories