In this week's Science Saturday, from space exploration to global warming, we take a look at science news making headlines around the world.

ExoMars space mission delayed to 2022

An ambitious Mars exploration project has been postponed due to the COVID-19 pandemic. The ExoMars mission, which was scheduled to launch in July this year, has been put off to 2022. Scientists also said they need more testing for the rover. ExoMars is part of a joint space program between the European Space Agency and and its Russian counterpart Roscosmos. The launch delay could mean another two years of waiting at least until the Earth is close enough to the Red Planet to send a craft there, without using too much extra fuel.

Scientists create new nerve interface technology

Researchers from the University of Michigan have created an updated nerve interface technology, to help upper limb amputees better control their prostheses. They wrap tiny muscle grafts around the nerve endings of amputees' arms, to amplify signals that come through nerves. This enables amputees to operate bionic hands with greater real-time precision. Also, implanting these muscle grafts prevents the emergence of nerve masses, or neuromas that can lead to phantom limb pain.

Bumblebees can recognize objects across senses

Researchers from Queen Mary University of London have found that like humans, bumblebees can recognize objects using various senses. In the experiment, they discovered the species can visually identify sugar rewards in cubes in a lit environment, after touching them in darkness. Forming mental images through multiple senses was thought to be a capacity only existing in vertebrates. Experts say the new finding in bees can shed light on the scientific research about how human brains generate visual representations.

WMO: Global mean sea level hit record high level in 2019

The World Meteorological Organization says the global mean sea level has hit its highest value on record in the past year. According to its 2019 climate report, the increasing amount of greenhouse gases in the atmosphere has caused melting of the ice sheet in Greenland and Antarctica, as well as heating of the ocean. The heat also reached a record two-kilometer depth in the sea last year. The WMO's secretary-general said a new peak of the annual global temperature will likely come in five years, if humans don't cut down on greenhouse emissions.

"Science Saturday" is part of CGTN's science and technology series "Tech It Out." The segment brings you the latest news about innovations and technological breakthroughs in the past two weeks from across the world.