Conquer Mars
China presents a desert lizard-like robot to explore Mars
Tests show that the lizard robot works well on Mars-like surfaces, boosting hopes for future missions to explore the planet.
FOUR
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Articles about FOUR
595 published items.
Animal world
Research shows that dogs help people increase their ability to concentrate
Research shows that when people have a four-legged friend to accompany them, they can improve their mood, reduce blood pressure, and reduce the stress hormone cortisol.
Scientific works
The world's largest frozen animal bank
San Diego's frozen zoo has just four researchers in charge of caring for more than 11,000 specimens, representing 1,300 different species and subspecies.
Environment
New study on catastrophic flooding in California over the next 40 years
The likelihood of catastrophic flooding in California has doubled over the next four decades, a new study says.
Science story
1g of salt dissolved in 1g of water, why is the total mass not 2g?
Considering the usual four-dimensional problem, what is the final total mass of a pound of salt dissolved in a pound of water?
Space science
What are the mysterious '59' black spots on the Moon? The Chang'e 4 train revealed the unexpected truth
Four mysterious black spots on the surface of the Moon were first discovered in 1959, leading many to suspect an alien base. What is the truth?
History
The Goliath Warriors Might Not Be As Huge As The Bible Describes
Early versions of the Bible describe Goliath - the ancient Philistine warrior known as a giant whose height in ancient terms reached four cubits and an arm span.
Science story
Could 4 extraterrestrial civilizations lurk in the Milky Way and attack us?
The Milky Way is home to millions of potentially habitable planets, and about four of them may contain extraterrestrial civilizations.
Science story
Research points to 'holes' in Darwin's theory of evolution
A new study shows that Darwinian evolution could have happened up to four times faster, based on analyzes of genetic variation.
Animal world
All cats have long tails, so why is the lynx's tail so short?
There are four members of the genus Lynx: the Eurasian lynx, the Canadian lynx, the Iberian lynx, and the bobcat, all of which have short tails and are noticeably shorte…
1001 mystery
A strange story about an Indian girl who remembers her past life
When she was just four years old, little Shanti Devi started telling her parents amazing details about her 'past life' life in a strange town, more than 100km away.
1001 mystery
The mystery of the valley full of strange square trees
A few miles north of the Panama Canal district is the Square Tree valley - a unique tourist attraction, home to exotic, square-shaped trees.
Space science
4 planets lined up to create an amazing astronomical phenomenon
Italian astrophysicist Gianluca Masi captured a unique moment of the 'parade' of the planets.
Discover science
Ultra-light fuel tank holds more than 150kg of hydrogen
The new fuel tank can help hydrogen aircraft fly four times farther than today's traditional fueled planes, and at the same time emit no carbon.
Space science
Scientists urge people to find 0.5kg of meteorite that fell in the UK
The meteorite that hit Earth last week could break into four pieces, about the size of an egg and be glossy black or brown.