UK scientists discover world's tallest tropical tree

Scientists in the UK and Malaysia say they have discovered the world's tallest tropical tree measuring more than 100m (328ft) high.
The lofty yellow meranti was spotted in a Borneo rainforest by a team from the University of Nottingham last year, according to BBC.
Researchers from the University of Oxford then carried out 3D scans and drone flights to confirm the record.
The tree, found in the Danum Valley Conservation Area in Sabah, has been named Menara, which is Malay for tower.

Rivers raged on Mars late into its history

Long ago on Mars, water carved deep riverbeds into the planet's surface -- but we still don't know what kind of weather fed them. Scientists aren't sure, because their understanding of the Martian climate billions of years ago remains incomplete.

A new study by University of Chicago scientists catalogued these rivers to conclude that significant river runoff persisted on Mars later into its history than previously thought, the runoff was intense -- rivers on Mars were wider than those on Earth today -- and occurred at hundreds of locations on the red planet, according to Science Daily.

Building blocks of LIFE arrived on Mars after asteroids crashed into the red planet and flourished thanks to its thick atmosphere

Asteroids that crashed into Mars may have brought with them the building blocks needed for life. 

A new study has found 'key ingredients for life' were transported to the red planet millions of years ago when the space rocks landed on it. 

Mars may have had an atmosphere made of hydrogen at the time and if this was the case, asteroids would likely have brought nitrogen to the planet - an essential element for many biological molecules, according to Daily Mail.

It involved creating various mixtures in flasks designed to imitate early asteroid impacts on Mars. 

Should cats be culled to stop extinctions?

Scientists are calling for a widespread cull of feral cats and dogs, pigs, goats, and rats and mice to save the endangered species they prey upon.

Their eradication on more than 100 islands could save some of the rarest animals on Earth, says an international team.

Islands have seen 75% of known bird, mammal, amphibian and reptile extinctions over the past 500 years.

Many of the losses are caused by animals introduced by humans.

Exoplanet tally set to pass 4,000 mark

The number of planets detected around other stars - or exoplanets - is set to hit the 4,000 mark.

The huge haul is a sign of the explosion of findings from searches with telescopes on the ground and in space over the last 25 years, according to BBC.

It's also an indication of just how common planets are - with most stars in the Milky Way hosting at least one world in orbit around them.