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Aliens have always been a topic of excitement and mystery. Now, a cosmologist in Spain said that if they exist, they could be much bigger compared to humans and could weigh more than 300 kilograms. According to Fergus Simpson, a scientist at the University of Barcelona, the average weight of aliens could be beyond 300 kilograms.

This has been estimated by the expert on basis of a mathematical model, according to which, organisms on other planets comply with the laws of conservation of energy, which are observed on Earth.

It implies that larger animals require more resources and use more energy, and as a result they are less abundant. For example, small ants exist in large numbers, whereas whales or elephants are not that abundant.

According to scientists of University of Alberta, they have discovered a dinosaur couple called Romeo and Juliet now. The researchers discovered them buried beneath the Mongolia-based Gobi Desert for more than 75 million years.

The scientists said that this is the mated pair was preserved for the abovementioned duration alongside each other. These two have found to be dead due to a vast sand dune collapsing over them. The sex of these oviraptors is not yet known because it is highly complex to find out the gender of a dinosaur, according to Scott Persons, lead author for the research.

Jeff Bezos, founder and CEO of Amazon. com, has been moving ahead with his aerospace company, Blue Origin. The Billionaire has been preparing to launch a spacecraft into earth's orbit. According to reports, the spaceship will be capable of carrying humans into the planet's orbit.

The aerospace company headquartered in Kent, Washington, has finished designing and testing the engine that will power the spaceship called New Shepard. As per the reports, if Blue Origin succeeds in it maiden mission, the craft will one day carry about three passengers to a height of about 62 miles.

According to a new report by expense-management system provider Certify, 47% of the ground transportation rides in March were through Uber.

The transportation rides tripled from the 14% of rides that Uber had just over a year ago in January 2014. Uber now tops taxi rides for business travelers in few cities. Certify based its findings on receipts submitted by North American clients each year.

In its hometown of San Francisco, 71% of rides during the first quarter were for Uber, 29% used taxis. Uber also beat out all other forms of ground transportation in Dallas, accounting for 56% of the rides.

Since solar-powered toilets have started rolling in four afternoons per week, the streets in San Francisco's Tenderloin neighborhood have been cleaner.

These mobile bathrooms on wheels, guarded by attendants, have become quite successful in the region. City officials have said that Portland, Oregon; Honolulu and New York have inquired about them. They are seeking solutions for similar sanitation problems.

The portable pit stops have earned a lot of supporters. These supporters have said that the public bathrooms accessibility has made their neighborhood known for crime, homelessness and poverty more livable.

Uzo Aduba, the actress who plays Crazy Eyes on 'Orange is the New Black', has been preparing to run the Boston Marathon in order to raise money for cancer research.

The race, to be held on April 20, will be Aduba's second marathon. She ran the marathon for the first time two years ago, in New York. That time also, it was to support cancer research,

Aduba said, "When I ran New York, there were four people in my life - one had passed, and three were battling cancer. Now, today, there's only one still fighting".

A personal loss in the fall inspired Aduba to run 26.2 miles again, this time in her hometown. The actress, who is part of the Dana-Farber Cancer Institute's marathon challenge, released a video on Tuesday to spread the word about sponsoring her run.