Which animals survived the dinosaur extinction?
All told, more than 75 percent of species known from the end of the Cretaceous period, 66 million years ago, didn’t make it to the following Paleogene period. The geologic break between the two is called the K-Pg boundary, and beaked birds were the only dinosaurs to survive the disaster.
What happens when you bleed in zero gravity?
Being in microgravity can have strange effects on the body – now it has emerged that it can make people’s blood flow backwards. The changes to circulation caused two astronauts to develop small blood clots, which could have been fatal. Fortunately, though, the man and woman affected came to no harm.
What is the average lifespan of an astronaut?
The average age for active women astronauts is 39.9 years while the same average for active men is 41.9 years. For inactive corps members, men have a mean age of 50.9 years while women have a mean age of 46.5 years.
Can you do surgery in space?
Surgery in microgravity is possible and has already been been carried out, albeit not on humans yet. For example, astronauts have managed to repair rat tails and perform laparoscopy – a minimally invasive surgical procedure used to examine and repair the organs inside the abdomen – on animals, while in microgravity.
Do they need doctors in space?
Become an astronaut But when telemedicine and force-feedback remote robotics don’t cut it, companies and governments will begin to need true “astro-doctors”: physicians trained as astronauts. Such doctors in space might be employed on large, long-term missions to orbit or the Moon.
Why do some species die out and become extinct?
Species may become extinct because of changes in climate (i.e. the ice age), competition with other species, a reduced food supply, or combinations of all of these. Most natural extinctions are isolated events that happen over a fairly long period of time.
Do flight surgeons go to space?
The National Aeronautics and Space Administration (NASA) assigns flight surgeons to every crew preparing for a space mission. These doctors are responsible for the astronauts’ health care and medical evaluations and training before, during, and after spaceflight.
Why did prehistoric animals become extinct?
The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs’ food supply.
Does blood freeze in space?
In fact, at a temperature of -270C (-454F), it is just a couple of degrees from Absolute Zero, the coldest it is possible to be. So if you ever find yourself floating from the space station without a working space suit, you might expect your body to freeze stiff. It is only then that you would freeze.
What caused the extinction of dinosaurs?
As originally proposed in 1980 by a team of scientists led by Luis Alvarez and his son Walter, it is now generally thought that the K–Pg extinction was caused by the impact of a massive comet or asteroid 10 to 15 km (6 to 9 mi) wide, 66 million years ago, which devastated the global environment, mainly through a …